Home / 8,785.32-12,123.45-5,246.43

Finding the Fourth Proportional to 8,785.32, 12,123.45 and 5,246.43

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Solution

The fourth proportional to 8,785.32, 12,123.45 and 5,246.43 is: 7,239.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,785.32 : 12,123.45 = 5,246.43 : x
  2. Step 2: Convert to fraction form
    8,785.32/12,123.45 = 5,246.43/x
  3. Step 3: Cross multiply
    8,785.32x = 12,123.45 × 5,246.43
  4. Step 4: Simplify right side
    8,785.32x = 63,604,831.78
  5. Step 5: Solve for x
    x = 63,604,831.78/8,785.32
  6. Step 6: Final answer
    x = 7,239.90

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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.