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Finding the Fourth Proportional to 5,320.76, 7,981.15 and 5,313.07

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Solution

The fourth proportional to 5,320.76, 7,981.15 and 5,313.07 is: 7,969.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,320.76 : 7,981.15 = 5,313.07 : x
  2. Step 2: Convert to fraction form
    5,320.76/7,981.15 = 5,313.07/x
  3. Step 3: Cross multiply
    5,320.76x = 7,981.15 × 5,313.07
  4. Step 4: Simplify right side
    5,320.76x = 42,404,446.11
  5. Step 5: Solve for x
    x = 42,404,446.11/5,320.76
  6. Step 6: Final answer
    x = 7,969.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.