Home / 7,981.20-12,031.57-7,445.99

Finding the Fourth Proportional to 7,981.20, 12,031.57 and 7,445.99

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Solution

The fourth proportional to 7,981.20, 12,031.57 and 7,445.99 is: 11,224.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.20 : 12,031.57 = 7,445.99 : x
  2. Step 2: Convert to fraction form
    7,981.20/12,031.57 = 7,445.99/x
  3. Step 3: Cross multiply
    7,981.20x = 12,031.57 × 7,445.99
  4. Step 4: Simplify right side
    7,981.20x = 89,586,989.29
  5. Step 5: Solve for x
    x = 89,586,989.29/7,981.20
  6. Step 6: Final answer
    x = 11,224.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.