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Finding the Fourth Proportional to 15,114.88, 20,851.20 and 9,810.56

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Solution

The fourth proportional to 15,114.88, 20,851.20 and 9,810.56 is: 13,533.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,114.88 : 20,851.20 = 9,810.56 : x
  2. Step 2: Convert to fraction form
    15,114.88/20,851.20 = 9,810.56/x
  3. Step 3: Cross multiply
    15,114.88x = 20,851.20 × 9,810.56
  4. Step 4: Simplify right side
    15,114.88x = 204,561,948.67
  5. Step 5: Solve for x
    x = 204,561,948.67/15,114.88
  6. Step 6: Final answer
    x = 13,533.81

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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.