Home / 21,111.74-29,127.13-12,159.06

Finding the Fourth Proportional to 21,111.74, 29,127.13 and 12,159.06

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Solution

The fourth proportional to 21,111.74, 29,127.13 and 12,159.06 is: 16,775.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,111.74 : 29,127.13 = 12,159.06 : x
  2. Step 2: Convert to fraction form
    21,111.74/29,127.13 = 12,159.06/x
  3. Step 3: Cross multiply
    21,111.74x = 29,127.13 × 12,159.06
  4. Step 4: Simplify right side
    21,111.74x = 354,158,545.51
  5. Step 5: Solve for x
    x = 354,158,545.51/21,111.74
  6. Step 6: Final answer
    x = 16,775.43

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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.