Home / 21,042.12-29,038.80-12,091.20

Finding the Fourth Proportional to 21,042.12, 29,038.80 and 12,091.20

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Solution

The fourth proportional to 21,042.12, 29,038.80 and 12,091.20 is: 16,686.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042.12 : 29,038.80 = 12,091.20 : x
  2. Step 2: Convert to fraction form
    21,042.12/29,038.80 = 12,091.20/x
  3. Step 3: Cross multiply
    21,042.12x = 29,038.80 × 12,091.20
  4. Step 4: Simplify right side
    21,042.12x = 351,113,938.56
  5. Step 5: Solve for x
    x = 351,113,938.56/21,042.12
  6. Step 6: Final answer
    x = 16,686.24

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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.