Home / 15,711.90-21,679.14-9,340.74

Finding the Fourth Proportional to 15,711.90, 21,679.14 and 9,340.74

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Solution

The fourth proportional to 15,711.90, 21,679.14 and 9,340.74 is: 12,888.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.90 : 21,679.14 = 9,340.74 : x
  2. Step 2: Convert to fraction form
    15,711.90/21,679.14 = 9,340.74/x
  3. Step 3: Cross multiply
    15,711.90x = 21,679.14 × 9,340.74
  4. Step 4: Simplify right side
    15,711.90x = 202,499,210.16
  5. Step 5: Solve for x
    x = 202,499,210.16/15,711.90
  6. Step 6: Final answer
    x = 12,888.27

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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.