Home / 18,820.42-28,239.84-13,309.18

Finding the Fourth Proportional to 18,820.42, 28,239.84 and 13,309.18

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Solution

The fourth proportional to 18,820.42, 28,239.84 and 13,309.18 is: 19,970.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.42 : 28,239.84 = 13,309.18 : x
  2. Step 2: Convert to fraction form
    18,820.42/28,239.84 = 13,309.18/x
  3. Step 3: Cross multiply
    18,820.42x = 28,239.84 × 13,309.18
  4. Step 4: Simplify right side
    18,820.42x = 375,849,043.13
  5. Step 5: Solve for x
    x = 375,849,043.13/18,820.42
  6. Step 6: Final answer
    x = 19,970.28

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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.