Home / 28,384.95-39,170.17-15,809.43

Finding the Fourth Proportional to 28,384.95, 39,170.17 and 15,809.43

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Solution

The fourth proportional to 28,384.95, 39,170.17 and 15,809.43 is: 21,816.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,384.95 : 39,170.17 = 15,809.43 : x
  2. Step 2: Convert to fraction form
    28,384.95/39,170.17 = 15,809.43/x
  3. Step 3: Cross multiply
    28,384.95x = 39,170.17 × 15,809.43
  4. Step 4: Simplify right side
    28,384.95x = 619,258,060.70
  5. Step 5: Solve for x
    x = 619,258,060.70/28,384.95
  6. Step 6: Final answer
    x = 21,816.42

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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.