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Finding the Fourth Proportional to 15,690.71, 21,652.72 and 9,230.29

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Solution

The fourth proportional to 15,690.71, 21,652.72 and 9,230.29 is: 12,737.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.71 : 21,652.72 = 9,230.29 : x
  2. Step 2: Convert to fraction form
    15,690.71/21,652.72 = 9,230.29/x
  3. Step 3: Cross multiply
    15,690.71x = 21,652.72 × 9,230.29
  4. Step 4: Simplify right side
    15,690.71x = 199,860,807.68
  5. Step 5: Solve for x
    x = 199,860,807.68/15,690.71
  6. Step 6: Final answer
    x = 12,737.52

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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.