Home / 15,285.79-21,085.45-9,611.55

Finding the Fourth Proportional to 15,285.79, 21,085.45 and 9,611.55

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Solution

The fourth proportional to 15,285.79, 21,085.45 and 9,611.55 is: 13,258.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,285.79 : 21,085.45 = 9,611.55 : x
  2. Step 2: Convert to fraction form
    15,285.79/21,085.45 = 9,611.55/x
  3. Step 3: Cross multiply
    15,285.79x = 21,085.45 × 9,611.55
  4. Step 4: Simplify right side
    15,285.79x = 202,663,832.92
  5. Step 5: Solve for x
    x = 202,663,832.92/15,285.79
  6. Step 6: Final answer
    x = 13,258.32

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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.