Home / 30,715.74-42,387.30-17,977.68

Finding the Fourth Proportional to 30,715.74, 42,387.30 and 17,977.68

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Solution

The fourth proportional to 30,715.74, 42,387.30 and 17,977.68 is: 24,808.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,715.74 : 42,387.30 = 17,977.68 : x
  2. Step 2: Convert to fraction form
    30,715.74/42,387.30 = 17,977.68/x
  3. Step 3: Cross multiply
    30,715.74x = 42,387.30 × 17,977.68
  4. Step 4: Simplify right side
    30,715.74x = 762,025,315.46
  5. Step 5: Solve for x
    x = 762,025,315.46/30,715.74
  6. Step 6: Final answer
    x = 24,808.95

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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.