Home / 7,981.47-11,011.55-5,330.61

Finding the Fourth Proportional to 7,981.47, 11,011.55 and 5,330.61

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Solution

The fourth proportional to 7,981.47, 11,011.55 and 5,330.61 is: 7,354.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.47 : 11,011.55 = 5,330.61 : x
  2. Step 2: Convert to fraction form
    7,981.47/11,011.55 = 5,330.61/x
  3. Step 3: Cross multiply
    7,981.47x = 11,011.55 × 5,330.61
  4. Step 4: Simplify right side
    7,981.47x = 58,698,251.89
  5. Step 5: Solve for x
    x = 58,698,251.89/7,981.47
  6. Step 6: Final answer
    x = 7,354.32

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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.