Home / 7,117.55-9,822.17-3,931.05

Finding the Fourth Proportional to 7,117.55, 9,822.17 and 3,931.05

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Solution

The fourth proportional to 7,117.55, 9,822.17 and 3,931.05 is: 5,424.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,117.55 : 9,822.17 = 3,931.05 : x
  2. Step 2: Convert to fraction form
    7,117.55/9,822.17 = 3,931.05/x
  3. Step 3: Cross multiply
    7,117.55x = 9,822.17 × 3,931.05
  4. Step 4: Simplify right side
    7,117.55x = 38,611,451.21
  5. Step 5: Solve for x
    x = 38,611,451.21/7,117.55
  6. Step 6: Final answer
    x = 5,424.82

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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.