Home / 19,617.15-29,416.45-7,128.47

Finding the Fourth Proportional to 19,617.15, 29,416.45 and 7,128.47

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Solution

The fourth proportional to 19,617.15, 29,416.45 and 7,128.47 is: 10,689.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,617.15 : 29,416.45 = 7,128.47 : x
  2. Step 2: Convert to fraction form
    19,617.15/29,416.45 = 7,128.47/x
  3. Step 3: Cross multiply
    19,617.15x = 29,416.45 × 7,128.47
  4. Step 4: Simplify right side
    19,617.15x = 209,694,281.33
  5. Step 5: Solve for x
    x = 209,694,281.33/19,617.15
  6. Step 6: Final answer
    x = 10,689.33

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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.