Home / 30,931.87-42,686.92-18,182.71

Finding the Fourth Proportional to 30,931.87, 42,686.92 and 18,182.71

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Solution

The fourth proportional to 30,931.87, 42,686.92 and 18,182.71 is: 25,092.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,931.87 : 42,686.92 = 18,182.71 : x
  2. Step 2: Convert to fraction form
    30,931.87/42,686.92 = 18,182.71/x
  3. Step 3: Cross multiply
    30,931.87x = 42,686.92 × 18,182.71
  4. Step 4: Simplify right side
    30,931.87x = 776,163,734.98
  5. Step 5: Solve for x
    x = 776,163,734.98/30,931.87
  6. Step 6: Final answer
    x = 25,092.69

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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.