Home / 21,029.56-31,565.40-15,113.40

Finding the Fourth Proportional to 21,029.56, 31,565.40 and 15,113.40

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Solution

The fourth proportional to 21,029.56, 31,565.40 and 15,113.40 is: 22,685.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,029.56 : 31,565.40 = 15,113.40 : x
  2. Step 2: Convert to fraction form
    21,029.56/31,565.40 = 15,113.40/x
  3. Step 3: Cross multiply
    21,029.56x = 31,565.40 × 15,113.40
  4. Step 4: Simplify right side
    21,029.56x = 477,060,516.36
  5. Step 5: Solve for x
    x = 477,060,516.36/21,029.56
  6. Step 6: Final answer
    x = 22,685.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.