Home / 30,665.62-45,988.71-13,130.74

Finding the Fourth Proportional to 30,665.62, 45,988.71 and 13,130.74

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Solution

The fourth proportional to 30,665.62, 45,988.71 and 13,130.74 is: 19,691.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,665.62 : 45,988.71 = 13,130.74 : x
  2. Step 2: Convert to fraction form
    30,665.62/45,988.71 = 13,130.74/x
  3. Step 3: Cross multiply
    30,665.62x = 45,988.71 × 13,130.74
  4. Step 4: Simplify right side
    30,665.62x = 603,865,793.95
  5. Step 5: Solve for x
    x = 603,865,793.95/30,665.62
  6. Step 6: Final answer
    x = 19,691.95

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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.