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Finding the Fourth Proportional to 5,715.50, 7,870.93 and 4,711.55

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Solution

The fourth proportional to 5,715.50, 7,870.93 and 4,711.55 is: 6,488.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,715.50 : 7,870.93 = 4,711.55 : x
  2. Step 2: Convert to fraction form
    5,715.50/7,870.93 = 4,711.55/x
  3. Step 3: Cross multiply
    5,715.50x = 7,870.93 × 4,711.55
  4. Step 4: Simplify right side
    5,715.50x = 37,084,289.91
  5. Step 5: Solve for x
    x = 37,084,289.91/5,715.50
  6. Step 6: Final answer
    x = 6,488.37

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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.