Home / 8,931.86-12,326.54-5,155.73

Finding the Fourth Proportional to 8,931.86, 12,326.54 and 5,155.73

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Solution

The fourth proportional to 8,931.86, 12,326.54 and 5,155.73 is: 7,115.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,931.86 : 12,326.54 = 5,155.73 : x
  2. Step 2: Convert to fraction form
    8,931.86/12,326.54 = 5,155.73/x
  3. Step 3: Cross multiply
    8,931.86x = 12,326.54 × 5,155.73
  4. Step 4: Simplify right side
    8,931.86x = 63,552,224.66
  5. Step 5: Solve for x
    x = 63,552,224.66/8,931.86
  6. Step 6: Final answer
    x = 7,115.23

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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.