Home / 31,354.74-47,031.39-7,981.20

Finding the Fourth Proportional to 31,354.74, 47,031.39 and 7,981.20

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Solution

The fourth proportional to 31,354.74, 47,031.39 and 7,981.20 is: 11,971.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,354.74 : 47,031.39 = 7,981.20 : x
  2. Step 2: Convert to fraction form
    31,354.74/47,031.39 = 7,981.20/x
  3. Step 3: Cross multiply
    31,354.74x = 47,031.39 × 7,981.20
  4. Step 4: Simplify right side
    31,354.74x = 375,366,929.87
  5. Step 5: Solve for x
    x = 375,366,929.87/31,354.74
  6. Step 6: Final answer
    x = 11,971.62

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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.