Home / 15,683.60-21,639.79-9,306.90

Finding the Fourth Proportional to 15,683.60, 21,639.79 and 9,306.90

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Solution

The fourth proportional to 15,683.60, 21,639.79 and 9,306.90 is: 12,841.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,683.60 : 21,639.79 = 9,306.90 : x
  2. Step 2: Convert to fraction form
    15,683.60/21,639.79 = 9,306.90/x
  3. Step 3: Cross multiply
    15,683.60x = 21,639.79 × 9,306.90
  4. Step 4: Simplify right side
    15,683.60x = 201,399,361.55
  5. Step 5: Solve for x
    x = 201,399,361.55/15,683.60
  6. Step 6: Final answer
    x = 12,841.40

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Half scale
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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.