Home / 12,884.18-17,780.45-7,219.35

Finding the Fourth Proportional to 12,884.18, 17,780.45 and 7,219.35

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Solution

The fourth proportional to 12,884.18, 17,780.45 and 7,219.35 is: 9,962.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,884.18 : 17,780.45 = 7,219.35 : x
  2. Step 2: Convert to fraction form
    12,884.18/17,780.45 = 7,219.35/x
  3. Step 3: Cross multiply
    12,884.18x = 17,780.45 × 7,219.35
  4. Step 4: Simplify right side
    12,884.18x = 128,363,255.61
  5. Step 5: Solve for x
    x = 128,363,255.61/12,884.18
  6. Step 6: Final answer
    x = 9,962.86

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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.