Home / 20,947.79-31,333.80-19,373.15

Finding the Fourth Proportional to 20,947.79, 31,333.80 and 19,373.15

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Solution

The fourth proportional to 20,947.79, 31,333.80 and 19,373.15 is: 28,978.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.79 : 31,333.80 = 19,373.15 : x
  2. Step 2: Convert to fraction form
    20,947.79/31,333.80 = 19,373.15/x
  3. Step 3: Cross multiply
    20,947.79x = 31,333.80 × 19,373.15
  4. Step 4: Simplify right side
    20,947.79x = 607,034,407.47
  5. Step 5: Solve for x
    x = 607,034,407.47/20,947.79
  6. Step 6: Final answer
    x = 28,978.45

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1.5x scale

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.