Home / 15,303.60-21,123.42-9,999.18

Finding the Fourth Proportional to 15,303.60, 21,123.42 and 9,999.18

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Solution

The fourth proportional to 15,303.60, 21,123.42 and 9,999.18 is: 13,801.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,303.60 : 21,123.42 = 9,999.18 : x
  2. Step 2: Convert to fraction form
    15,303.60/21,123.42 = 9,999.18/x
  3. Step 3: Cross multiply
    15,303.60x = 21,123.42 × 9,999.18
  4. Step 4: Simplify right side
    15,303.60x = 211,216,878.80
  5. Step 5: Solve for x
    x = 211,216,878.80/15,303.60
  6. Step 6: Final answer
    x = 13,801.78

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.