Home / 30,521.86-42,120.81-18,585.70

Finding the Fourth Proportional to 30,521.86, 42,120.81 and 18,585.70

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Solution

The fourth proportional to 30,521.86, 42,120.81 and 18,585.70 is: 25,648.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,521.86 : 42,120.81 = 18,585.70 : x
  2. Step 2: Convert to fraction form
    30,521.86/42,120.81 = 18,585.70/x
  3. Step 3: Cross multiply
    30,521.86x = 42,120.81 × 18,585.70
  4. Step 4: Simplify right side
    30,521.86x = 782,844,738.42
  5. Step 5: Solve for x
    x = 782,844,738.42/30,521.86
  6. Step 6: Final answer
    x = 25,648.66

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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.