Home / 10,981.30-15,153.28-6,443.51

Finding the Fourth Proportional to 10,981.30, 15,153.28 and 6,443.51

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Solution

The fourth proportional to 10,981.30, 15,153.28 and 6,443.51 is: 8,891.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,981.30 : 15,153.28 = 6,443.51 : x
  2. Step 2: Convert to fraction form
    10,981.30/15,153.28 = 6,443.51/x
  3. Step 3: Cross multiply
    10,981.30x = 15,153.28 × 6,443.51
  4. Step 4: Simplify right side
    10,981.30x = 97,640,219.80
  5. Step 5: Solve for x
    x = 97,640,219.80/10,981.30
  6. Step 6: Final answer
    x = 8,891.50

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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.