Home / 20,642.60-28,486.32-11,210.96

Finding the Fourth Proportional to 20,642.60, 28,486.32 and 11,210.96

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Solution

The fourth proportional to 20,642.60, 28,486.32 and 11,210.96 is: 15,470.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.60 : 28,486.32 = 11,210.96 : x
  2. Step 2: Convert to fraction form
    20,642.60/28,486.32 = 11,210.96/x
  3. Step 3: Cross multiply
    20,642.60x = 28,486.32 × 11,210.96
  4. Step 4: Simplify right side
    20,642.60x = 319,358,994.07
  5. Step 5: Solve for x
    x = 319,358,994.07/20,642.60
  6. Step 6: Final answer
    x = 15,470.87

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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.