Home / 20,341.28-30,388.64-12,886.08

Finding the Fourth Proportional to 20,341.28, 30,388.64 and 12,886.08

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Solution

The fourth proportional to 20,341.28, 30,388.64 and 12,886.08 is: 19,251.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,341.28 : 30,388.64 = 12,886.08 : x
  2. Step 2: Convert to fraction form
    20,341.28/30,388.64 = 12,886.08/x
  3. Step 3: Cross multiply
    20,341.28x = 30,388.64 × 12,886.08
  4. Step 4: Simplify right side
    20,341.28x = 391,590,446.13
  5. Step 5: Solve for x
    x = 391,590,446.13/20,341.28
  6. Step 6: Final answer
    x = 19,251.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.