Home / 20,487.60-28,274.40-11,536.08

Finding the Fourth Proportional to 20,487.60, 28,274.40 and 11,536.08

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Solution

The fourth proportional to 20,487.60, 28,274.40 and 11,536.08 is: 15,920.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.60 : 28,274.40 = 11,536.08 : x
  2. Step 2: Convert to fraction form
    20,487.60/28,274.40 = 11,536.08/x
  3. Step 3: Cross multiply
    20,487.60x = 28,274.40 × 11,536.08
  4. Step 4: Simplify right side
    20,487.60x = 326,175,740.35
  5. Step 5: Solve for x
    x = 326,175,740.35/20,487.60
  6. Step 6: Final answer
    x = 15,920.64

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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.