Home / 30,689.66-42,353.95-18,755.28

Finding the Fourth Proportional to 30,689.66, 42,353.95 and 18,755.28

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Solution

The fourth proportional to 30,689.66, 42,353.95 and 18,755.28 is: 25,883.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,689.66 : 42,353.95 = 18,755.28 : x
  2. Step 2: Convert to fraction form
    30,689.66/42,353.95 = 18,755.28/x
  3. Step 3: Cross multiply
    30,689.66x = 42,353.95 × 18,755.28
  4. Step 4: Simplify right side
    30,689.66x = 794,360,191.36
  5. Step 5: Solve for x
    x = 794,360,191.36/30,689.66
  6. Step 6: Final answer
    x = 25,883.64

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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.