Home / 30,718.80-42,392.40-18,143.52

Finding the Fourth Proportional to 30,718.80, 42,392.40 and 18,143.52

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Solution

The fourth proportional to 30,718.80, 42,392.40 and 18,143.52 is: 25,038.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,718.80 : 42,392.40 = 18,143.52 : x
  2. Step 2: Convert to fraction form
    30,718.80/42,392.40 = 18,143.52/x
  3. Step 3: Cross multiply
    30,718.80x = 42,392.40 × 18,143.52
  4. Step 4: Simplify right side
    30,718.80x = 769,147,357.25
  5. Step 5: Solve for x
    x = 769,147,357.25/30,718.80
  6. Step 6: Final answer
    x = 25,038.33

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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.