Home / 20,877.96-28,810.68-12,499.08

Finding the Fourth Proportional to 20,877.96, 28,810.68 and 12,499.08

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Solution

The fourth proportional to 20,877.96, 28,810.68 and 12,499.08 is: 17,248.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.96 : 28,810.68 = 12,499.08 : x
  2. Step 2: Convert to fraction form
    20,877.96/28,810.68 = 12,499.08/x
  3. Step 3: Cross multiply
    20,877.96x = 28,810.68 × 12,499.08
  4. Step 4: Simplify right side
    20,877.96x = 360,106,994.17
  5. Step 5: Solve for x
    x = 360,106,994.17/20,877.96
  6. Step 6: Final answer
    x = 17,248.19

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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.