Home / 27,638.55-38,139.30-15,539.31

Finding the Fourth Proportional to 27,638.55, 38,139.30 and 15,539.31

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Solution

The fourth proportional to 27,638.55, 38,139.30 and 15,539.31 is: 21,443.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,638.55 : 38,139.30 = 15,539.31 : x
  2. Step 2: Convert to fraction form
    27,638.55/38,139.30 = 15,539.31/x
  3. Step 3: Cross multiply
    27,638.55x = 38,139.30 × 15,539.31
  4. Step 4: Simplify right side
    27,638.55x = 592,658,405.88
  5. Step 5: Solve for x
    x = 592,658,405.88/27,638.55
  6. Step 6: Final answer
    x = 21,443.18

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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.