Home / 10,084.78-15,127.20-3,509.40

Finding the Fourth Proportional to 10,084.78, 15,127.20 and 3,509.40

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Solution

The fourth proportional to 10,084.78, 15,127.20 and 3,509.40 is: 5,264.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,084.78 : 15,127.20 = 3,509.40 : x
  2. Step 2: Convert to fraction form
    10,084.78/15,127.20 = 3,509.40/x
  3. Step 3: Cross multiply
    10,084.78x = 15,127.20 × 3,509.40
  4. Step 4: Simplify right side
    10,084.78x = 53,087,395.68
  5. Step 5: Solve for x
    x = 53,087,395.68/10,084.78
  6. Step 6: Final answer
    x = 5,264.11

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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.