Home / 30,722.40-42,393.15-19,387.62

Finding the Fourth Proportional to 30,722.40, 42,393.15 and 19,387.62

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Solution

The fourth proportional to 30,722.40, 42,393.15 and 19,387.62 is: 26,752.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,722.40 : 42,393.15 = 19,387.62 : x
  2. Step 2: Convert to fraction form
    30,722.40/42,393.15 = 19,387.62/x
  3. Step 3: Cross multiply
    30,722.40x = 42,393.15 × 19,387.62
  4. Step 4: Simplify right side
    30,722.40x = 821,902,282.80
  5. Step 5: Solve for x
    x = 821,902,282.80/30,722.40
  6. Step 6: Final answer
    x = 26,752.54

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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.