Home / 28,059.90-38,721.45-15,312.76

Finding the Fourth Proportional to 28,059.90, 38,721.45 and 15,312.76

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Solution

The fourth proportional to 28,059.90, 38,721.45 and 15,312.76 is: 21,130.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,059.90 : 38,721.45 = 15,312.76 : x
  2. Step 2: Convert to fraction form
    28,059.90/38,721.45 = 15,312.76/x
  3. Step 3: Cross multiply
    28,059.90x = 38,721.45 × 15,312.76
  4. Step 4: Simplify right side
    28,059.90x = 592,932,376.53
  5. Step 5: Solve for x
    x = 592,932,376.53/28,059.90
  6. Step 6: Final answer
    x = 21,130.95

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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.