Home / 20,430.08-28,196.56-12,476.88

Finding the Fourth Proportional to 20,430.08, 28,196.56 and 12,476.88

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Solution

The fourth proportional to 20,430.08, 28,196.56 and 12,476.88 is: 17,219.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.08 : 28,196.56 = 12,476.88 : x
  2. Step 2: Convert to fraction form
    20,430.08/28,196.56 = 12,476.88/x
  3. Step 3: Cross multiply
    20,430.08x = 28,196.56 × 12,476.88
  4. Step 4: Simplify right side
    20,430.08x = 351,805,095.53
  5. Step 5: Solve for x
    x = 351,805,095.53/20,430.08
  6. Step 6: Final answer
    x = 17,219.96

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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.