Home / 21,862.55-30,165.14-12,436.31

Finding the Fourth Proportional to 21,862.55, 30,165.14 and 12,436.31

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Solution

The fourth proportional to 21,862.55, 30,165.14 and 12,436.31 is: 17,159.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,862.55 : 30,165.14 = 12,436.31 : x
  2. Step 2: Convert to fraction form
    21,862.55/30,165.14 = 12,436.31/x
  3. Step 3: Cross multiply
    21,862.55x = 30,165.14 × 12,436.31
  4. Step 4: Simplify right side
    21,862.55x = 375,142,970.05
  5. Step 5: Solve for x
    x = 375,142,970.05/21,862.55
  6. Step 6: Final answer
    x = 17,159.16

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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.