Home / 10,128.78-15,148.80-6,169.10

Finding the Fourth Proportional to 10,128.78, 15,148.80 and 6,169.10

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Solution

The fourth proportional to 10,128.78, 15,148.80 and 6,169.10 is: 9,226.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128.78 : 15,148.80 = 6,169.10 : x
  2. Step 2: Convert to fraction form
    10,128.78/15,148.80 = 6,169.10/x
  3. Step 3: Cross multiply
    10,128.78x = 15,148.80 × 6,169.10
  4. Step 4: Simplify right side
    10,128.78x = 93,454,386.34
  5. Step 5: Solve for x
    x = 93,454,386.34/10,128.78
  6. Step 6: Final answer
    x = 9,226.62

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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.