Home / 21,405.47-29,541.77-12,331.14

Finding the Fourth Proportional to 21,405.47, 29,541.77 and 12,331.14

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Solution

The fourth proportional to 21,405.47, 29,541.77 and 12,331.14 is: 17,018.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.47 : 29,541.77 = 12,331.14 : x
  2. Step 2: Convert to fraction form
    21,405.47/29,541.77 = 12,331.14/x
  3. Step 3: Cross multiply
    21,405.47x = 29,541.77 × 12,331.14
  4. Step 4: Simplify right side
    21,405.47x = 364,283,640.06
  5. Step 5: Solve for x
    x = 364,283,640.06/21,405.47
  6. Step 6: Final answer
    x = 17,018.25

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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.