Home / 30,868.80-42,595.92-18,291.12

Finding the Fourth Proportional to 30,868.80, 42,595.92 and 18,291.12

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Solution

The fourth proportional to 30,868.80, 42,595.92 and 18,291.12 is: 25,239.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,868.80 : 42,595.92 = 18,291.12 : x
  2. Step 2: Convert to fraction form
    30,868.80/42,595.92 = 18,291.12/x
  3. Step 3: Cross multiply
    30,868.80x = 42,595.92 × 18,291.12
  4. Step 4: Simplify right side
    30,868.80x = 779,127,084.23
  5. Step 5: Solve for x
    x = 779,127,084.23/30,868.80
  6. Step 6: Final answer
    x = 25,239.95

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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.