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Finding the Fourth Proportional to 18,703.88, 28,055.52 and 5,565.12

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Solution

The fourth proportional to 18,703.88, 28,055.52 and 5,565.12 is: 8,347.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.88 : 28,055.52 = 5,565.12 : x
  2. Step 2: Convert to fraction form
    18,703.88/28,055.52 = 5,565.12/x
  3. Step 3: Cross multiply
    18,703.88x = 28,055.52 × 5,565.12
  4. Step 4: Simplify right side
    18,703.88x = 156,132,335.46
  5. Step 5: Solve for x
    x = 156,132,335.46/18,703.88
  6. Step 6: Final answer
    x = 8,347.59

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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.