Home / 21,510.14-29,684.18-12,555.90

Finding the Fourth Proportional to 21,510.14, 29,684.18 and 12,555.90

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Solution

The fourth proportional to 21,510.14, 29,684.18 and 12,555.90 is: 17,327.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,510.14 : 29,684.18 = 12,555.90 : x
  2. Step 2: Convert to fraction form
    21,510.14/29,684.18 = 12,555.90/x
  3. Step 3: Cross multiply
    21,510.14x = 29,684.18 × 12,555.90
  4. Step 4: Simplify right side
    21,510.14x = 372,711,627.05
  5. Step 5: Solve for x
    x = 372,711,627.05/21,510.14
  6. Step 6: Final answer
    x = 17,327.26

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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.