Home / 9,122.40-12,587.88-5,143.68

Finding the Fourth Proportional to 9,122.40, 12,587.88 and 5,143.68

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Solution

The fourth proportional to 9,122.40, 12,587.88 and 5,143.68 is: 7,097.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,122.40 : 12,587.88 = 5,143.68 : x
  2. Step 2: Convert to fraction form
    9,122.40/12,587.88 = 5,143.68/x
  3. Step 3: Cross multiply
    9,122.40x = 12,587.88 × 5,143.68
  4. Step 4: Simplify right side
    9,122.40x = 64,748,026.60
  5. Step 5: Solve for x
    x = 64,748,026.60/9,122.40
  6. Step 6: Final answer
    x = 7,097.70

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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.