Home / 30,886.34-42,622.11-18,139.28

Finding the Fourth Proportional to 30,886.34, 42,622.11 and 18,139.28

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Solution

The fourth proportional to 30,886.34, 42,622.11 and 18,139.28 is: 25,031.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,886.34 : 42,622.11 = 18,139.28 : x
  2. Step 2: Convert to fraction form
    30,886.34/42,622.11 = 18,139.28/x
  3. Step 3: Cross multiply
    30,886.34x = 42,622.11 × 18,139.28
  4. Step 4: Simplify right side
    30,886.34x = 773,134,387.48
  5. Step 5: Solve for x
    x = 773,134,387.48/30,886.34
  6. Step 6: Final answer
    x = 25,031.60

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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.