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Finding the Fourth Proportional to 5,373.28, 7,990.52 and 5,315.68

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Solution

The fourth proportional to 5,373.28, 7,990.52 and 5,315.68 is: 7,904.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,373.28 : 7,990.52 = 5,315.68 : x
  2. Step 2: Convert to fraction form
    5,373.28/7,990.52 = 5,315.68/x
  3. Step 3: Cross multiply
    5,373.28x = 7,990.52 × 5,315.68
  4. Step 4: Simplify right side
    5,373.28x = 42,475,047.35
  5. Step 5: Solve for x
    x = 42,475,047.35/5,373.28
  6. Step 6: Final answer
    x = 7,904.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.