Home / 30,778.71-42,474.60-16,631.52

Finding the Fourth Proportional to 30,778.71, 42,474.60 and 16,631.52

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Solution

The fourth proportional to 30,778.71, 42,474.60 and 16,631.52 is: 22,951.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,778.71 : 42,474.60 = 16,631.52 : x
  2. Step 2: Convert to fraction form
    30,778.71/42,474.60 = 16,631.52/x
  3. Step 3: Cross multiply
    30,778.71x = 42,474.60 × 16,631.52
  4. Step 4: Simplify right side
    30,778.71x = 706,417,159.39
  5. Step 5: Solve for x
    x = 706,417,159.39/30,778.71
  6. Step 6: Final answer
    x = 22,951.49

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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.