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Finding the Fourth Proportional to 15,475.51, 21,356.51 and 8,761.42

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Solution

The fourth proportional to 15,475.51, 21,356.51 and 8,761.42 is: 12,090.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,475.51 : 21,356.51 = 8,761.42 : x
  2. Step 2: Convert to fraction form
    15,475.51/21,356.51 = 8,761.42/x
  3. Step 3: Cross multiply
    15,475.51x = 21,356.51 × 8,761.42
  4. Step 4: Simplify right side
    15,475.51x = 187,113,265.89
  5. Step 5: Solve for x
    x = 187,113,265.89/15,475.51
  6. Step 6: Final answer
    x = 12,090.93

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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.