Home / 15,128.19-20,878.83-9,160.11

Finding the Fourth Proportional to 15,128.19, 20,878.83 and 9,160.11

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Solution

The fourth proportional to 15,128.19, 20,878.83 and 9,160.11 is: 12,642.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.19 : 20,878.83 = 9,160.11 : x
  2. Step 2: Convert to fraction form
    15,128.19/20,878.83 = 9,160.11/x
  3. Step 3: Cross multiply
    15,128.19x = 20,878.83 × 9,160.11
  4. Step 4: Simplify right side
    15,128.19x = 191,252,379.47
  5. Step 5: Solve for x
    x = 191,252,379.47/15,128.19
  6. Step 6: Final answer
    x = 12,642.12

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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.