Home / 15,255.20-21,051.61-8,881.47

Finding the Fourth Proportional to 15,255.20, 21,051.61 and 8,881.47

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Solution

The fourth proportional to 15,255.20, 21,051.61 and 8,881.47 is: 12,256.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,255.20 : 21,051.61 = 8,881.47 : x
  2. Step 2: Convert to fraction form
    15,255.20/21,051.61 = 8,881.47/x
  3. Step 3: Cross multiply
    15,255.20x = 21,051.61 × 8,881.47
  4. Step 4: Simplify right side
    15,255.20x = 186,969,220.46
  5. Step 5: Solve for x
    x = 186,969,220.46/15,255.20
  6. Step 6: Final answer
    x = 12,256.10

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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.