Home / 15,211.28-20,989.32-8,925.68

Finding the Fourth Proportional to 15,211.28, 20,989.32 and 8,925.68

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Solution

The fourth proportional to 15,211.28, 20,989.32 and 8,925.68 is: 12,316.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,211.28 : 20,989.32 = 8,925.68 : x
  2. Step 2: Convert to fraction form
    15,211.28/20,989.32 = 8,925.68/x
  3. Step 3: Cross multiply
    15,211.28x = 20,989.32 × 8,925.68
  4. Step 4: Simplify right side
    15,211.28x = 187,343,953.74
  5. Step 5: Solve for x
    x = 187,343,953.74/15,211.28
  6. Step 6: Final answer
    x = 12,316.12

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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.