Home / 15,128.07-22,590.12-12,360.21

Finding the Fourth Proportional to 15,128.07, 22,590.12 and 12,360.21

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Solution

The fourth proportional to 15,128.07, 22,590.12 and 12,360.21 is: 18,456.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.07 : 22,590.12 = 12,360.21 : x
  2. Step 2: Convert to fraction form
    15,128.07/22,590.12 = 12,360.21/x
  3. Step 3: Cross multiply
    15,128.07x = 22,590.12 × 12,360.21
  4. Step 4: Simplify right side
    15,128.07x = 279,218,627.13
  5. Step 5: Solve for x
    x = 279,218,627.13/15,128.07
  6. Step 6: Final answer
    x = 18,456.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.