Home / 21,281.50-29,355.16-15,303.70

Finding the Fourth Proportional to 21,281.50, 29,355.16 and 15,303.70

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Solution

The fourth proportional to 21,281.50, 29,355.16 and 15,303.70 is: 21,109.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.50 : 29,355.16 = 15,303.70 : x
  2. Step 2: Convert to fraction form
    21,281.50/29,355.16 = 15,303.70/x
  3. Step 3: Cross multiply
    21,281.50x = 29,355.16 × 15,303.70
  4. Step 4: Simplify right side
    21,281.50x = 449,242,338.80
  5. Step 5: Solve for x
    x = 449,242,338.80/21,281.50
  6. Step 6: Final answer
    x = 21,109.53

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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.