Home / 20,486.08-28,270.56-12,102.40

Finding the Fourth Proportional to 20,486.08, 28,270.56 and 12,102.40

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Solution

The fourth proportional to 20,486.08, 28,270.56 and 12,102.40 is: 16,701.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.08 : 28,270.56 = 12,102.40 : x
  2. Step 2: Convert to fraction form
    20,486.08/28,270.56 = 12,102.40/x
  3. Step 3: Cross multiply
    20,486.08x = 28,270.56 × 12,102.40
  4. Step 4: Simplify right side
    20,486.08x = 342,141,625.34
  5. Step 5: Solve for x
    x = 342,141,625.34/20,486.08
  6. Step 6: Final answer
    x = 16,701.18

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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.