Home / 20,470.23-30,682.80-7,987.95

Finding the Fourth Proportional to 20,470.23, 30,682.80 and 7,987.95

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Solution

The fourth proportional to 20,470.23, 30,682.80 and 7,987.95 is: 11,973.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.23 : 30,682.80 = 7,987.95 : x
  2. Step 2: Convert to fraction form
    20,470.23/30,682.80 = 7,987.95/x
  3. Step 3: Cross multiply
    20,470.23x = 30,682.80 × 7,987.95
  4. Step 4: Simplify right side
    20,470.23x = 245,092,672.26
  5. Step 5: Solve for x
    x = 245,092,672.26/20,470.23
  6. Step 6: Final answer
    x = 11,973.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.