Home / 10,989.18-15,160.95-7,214.45

Finding the Fourth Proportional to 10,989.18, 15,160.95 and 7,214.45

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Solution

The fourth proportional to 10,989.18, 15,160.95 and 7,214.45 is: 9,953.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,989.18 : 15,160.95 = 7,214.45 : x
  2. Step 2: Convert to fraction form
    10,989.18/15,160.95 = 7,214.45/x
  3. Step 3: Cross multiply
    10,989.18x = 15,160.95 × 7,214.45
  4. Step 4: Simplify right side
    10,989.18x = 109,377,839.92
  5. Step 5: Solve for x
    x = 109,377,839.92/10,989.18
  6. Step 6: Final answer
    x = 9,953.23

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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.