Home / 38,715.12-53,430.90-21,723.95

Finding the Fourth Proportional to 38,715.12, 53,430.90 and 21,723.95

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Solution

The fourth proportional to 38,715.12, 53,430.90 and 21,723.95 is: 29,981.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,715.12 : 53,430.90 = 21,723.95 : x
  2. Step 2: Convert to fraction form
    38,715.12/53,430.90 = 21,723.95/x
  3. Step 3: Cross multiply
    38,715.12x = 53,430.90 × 21,723.95
  4. Step 4: Simplify right side
    38,715.12x = 1,160,729,932.90
  5. Step 5: Solve for x
    x = 1,160,729,932.90/38,715.12
  6. Step 6: Final answer
    x = 29,981.31

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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.