Home / 30,695.90-42,335.07-18,108.50

Finding the Fourth Proportional to 30,695.90, 42,335.07 and 18,108.50

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Solution

The fourth proportional to 30,695.90, 42,335.07 and 18,108.50 is: 24,974.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,695.90 : 42,335.07 = 18,108.50 : x
  2. Step 2: Convert to fraction form
    30,695.90/42,335.07 = 18,108.50/x
  3. Step 3: Cross multiply
    30,695.90x = 42,335.07 × 18,108.50
  4. Step 4: Simplify right side
    30,695.90x = 766,624,615.10
  5. Step 5: Solve for x
    x = 766,624,615.10/30,695.90
  6. Step 6: Final answer
    x = 24,974.82

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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.