Home / 30,691.77-42,355.08-18,116.52

Finding the Fourth Proportional to 30,691.77, 42,355.08 and 18,116.52

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Solution

The fourth proportional to 30,691.77, 42,355.08 and 18,116.52 is: 25,001.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,691.77 : 42,355.08 = 18,116.52 : x
  2. Step 2: Convert to fraction form
    30,691.77/42,355.08 = 18,116.52/x
  3. Step 3: Cross multiply
    30,691.77x = 42,355.08 × 18,116.52
  4. Step 4: Simplify right side
    30,691.77x = 767,326,653.92
  5. Step 5: Solve for x
    x = 767,326,653.92/30,691.77
  6. Step 6: Final answer
    x = 25,001.06

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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.