Home / 20,487.06-28,271.70-11,988.18

Finding the Fourth Proportional to 20,487.06, 28,271.70 and 11,988.18

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Solution

The fourth proportional to 20,487.06, 28,271.70 and 11,988.18 is: 16,543.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.06 : 28,271.70 = 11,988.18 : x
  2. Step 2: Convert to fraction form
    20,487.06/28,271.70 = 11,988.18/x
  3. Step 3: Cross multiply
    20,487.06x = 28,271.70 × 11,988.18
  4. Step 4: Simplify right side
    20,487.06x = 338,926,228.51
  5. Step 5: Solve for x
    x = 338,926,228.51/20,487.06
  6. Step 6: Final answer
    x = 16,543.43

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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.