Home / 30,781.14-42,478.35-17,352.40

Finding the Fourth Proportional to 30,781.14, 42,478.35 and 17,352.40

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Solution

The fourth proportional to 30,781.14, 42,478.35 and 17,352.40 is: 23,946.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,781.14 : 42,478.35 = 17,352.40 : x
  2. Step 2: Convert to fraction form
    30,781.14/42,478.35 = 17,352.40/x
  3. Step 3: Cross multiply
    30,781.14x = 42,478.35 × 17,352.40
  4. Step 4: Simplify right side
    30,781.14x = 737,101,320.54
  5. Step 5: Solve for x
    x = 737,101,320.54/30,781.14
  6. Step 6: Final answer
    x = 23,946.52

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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.