Home / 21,740.18-30,001.40-12,309.62

Finding the Fourth Proportional to 21,740.18, 30,001.40 and 12,309.62

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Solution

The fourth proportional to 21,740.18, 30,001.40 and 12,309.62 is: 16,987.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,740.18 : 30,001.40 = 12,309.62 : x
  2. Step 2: Convert to fraction form
    21,740.18/30,001.40 = 12,309.62/x
  3. Step 3: Cross multiply
    21,740.18x = 30,001.40 × 12,309.62
  4. Step 4: Simplify right side
    21,740.18x = 369,305,621.91
  5. Step 5: Solve for x
    x = 369,305,621.91/21,740.18
  6. Step 6: Final answer
    x = 16,987.24

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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.