Home / 15,431.61-23,159.43-7,115.34

Finding the Fourth Proportional to 15,431.61, 23,159.43 and 7,115.34

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Solution

The fourth proportional to 15,431.61, 23,159.43 and 7,115.34 is: 10,678.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.61 : 23,159.43 = 7,115.34 : x
  2. Step 2: Convert to fraction form
    15,431.61/23,159.43 = 7,115.34/x
  3. Step 3: Cross multiply
    15,431.61x = 23,159.43 × 7,115.34
  4. Step 4: Simplify right side
    15,431.61x = 164,787,218.66
  5. Step 5: Solve for x
    x = 164,787,218.66/15,431.61
  6. Step 6: Final answer
    x = 10,678.55

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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.