Home / 9,121.52-12,587.70-4,929.78

Finding the Fourth Proportional to 9,121.52, 12,587.70 and 4,929.78

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Solution

The fourth proportional to 9,121.52, 12,587.70 and 4,929.78 is: 6,803.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,121.52 : 12,587.70 = 4,929.78 : x
  2. Step 2: Convert to fraction form
    9,121.52/12,587.70 = 4,929.78/x
  3. Step 3: Cross multiply
    9,121.52x = 12,587.70 × 4,929.78
  4. Step 4: Simplify right side
    9,121.52x = 62,054,591.71
  5. Step 5: Solve for x
    x = 62,054,591.71/9,121.52
  6. Step 6: Final answer
    x = 6,803.10

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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.