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Finding the Fourth Proportional to 29,261.52, 40,399.80 and 18,090

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Solution

The fourth proportional to 29,261.52, 40,399.80 and 18,090 is: 24,975.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,261.52 : 40,399.80 = 18,090 : x
  2. Step 2: Convert to fraction form
    29,261.52/40,399.80 = 18,090/x
  3. Step 3: Cross multiply
    29,261.52x = 40,399.80 × 18,090
  4. Step 4: Simplify right side
    29,261.52x = 730,832,382
  5. Step 5: Solve for x
    x = 730,832,382/29,261.52
  6. Step 6: Final answer
    x = 24,975.89

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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.