Home / 21,310.02-29,426.40-13,365.90

Finding the Fourth Proportional to 21,310.02, 29,426.40 and 13,365.90

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Solution

The fourth proportional to 21,310.02, 29,426.40 and 13,365.90 is: 18,456.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.02 : 29,426.40 = 13,365.90 : x
  2. Step 2: Convert to fraction form
    21,310.02/29,426.40 = 13,365.90/x
  3. Step 3: Cross multiply
    21,310.02x = 29,426.40 × 13,365.90
  4. Step 4: Simplify right side
    21,310.02x = 393,310,319.76
  5. Step 5: Solve for x
    x = 393,310,319.76/21,310.02
  6. Step 6: Final answer
    x = 18,456.59

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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.