Home / 30,689.04-42,366.68-18,117.84

Finding the Fourth Proportional to 30,689.04, 42,366.68 and 18,117.84

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Solution

The fourth proportional to 30,689.04, 42,366.68 and 18,117.84 is: 25,011.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,689.04 : 42,366.68 = 18,117.84 : x
  2. Step 2: Convert to fraction form
    30,689.04/42,366.68 = 18,117.84/x
  3. Step 3: Cross multiply
    30,689.04x = 42,366.68 × 18,117.84
  4. Step 4: Simplify right side
    30,689.04x = 767,592,729.57
  5. Step 5: Solve for x
    x = 767,592,729.57/30,689.04
  6. Step 6: Final answer
    x = 25,011.95

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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.