Home / 5,320.74-7,981.38-1,989.84

Finding the Fourth Proportional to 5,320.74, 7,981.38 and 1,989.84

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Solution

The fourth proportional to 5,320.74, 7,981.38 and 1,989.84 is: 2,984.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,320.74 : 7,981.38 = 1,989.84 : x
  2. Step 2: Convert to fraction form
    5,320.74/7,981.38 = 1,989.84/x
  3. Step 3: Cross multiply
    5,320.74x = 7,981.38 × 1,989.84
  4. Step 4: Simplify right side
    5,320.74x = 15,881,669.18
  5. Step 5: Solve for x
    x = 15,881,669.18/5,320.74
  6. Step 6: Final answer
    x = 2,984.86

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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.