Home / 15,131.97-20,881.80-8,417.45

Finding the Fourth Proportional to 15,131.97, 20,881.80 and 8,417.45

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Solution

The fourth proportional to 15,131.97, 20,881.80 and 8,417.45 is: 11,615.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,131.97 : 20,881.80 = 8,417.45 : x
  2. Step 2: Convert to fraction form
    15,131.97/20,881.80 = 8,417.45/x
  3. Step 3: Cross multiply
    15,131.97x = 20,881.80 × 8,417.45
  4. Step 4: Simplify right side
    15,131.97x = 175,771,559.61
  5. Step 5: Solve for x
    x = 175,771,559.61/15,131.97
  6. Step 6: Final answer
    x = 11,615.91

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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.