Home / 20,654.04-28,501.20-11,222.40

Finding the Fourth Proportional to 20,654.04, 28,501.20 and 11,222.40

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Solution

The fourth proportional to 20,654.04, 28,501.20 and 11,222.40 is: 15,486.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,654.04 : 28,501.20 = 11,222.40 : x
  2. Step 2: Convert to fraction form
    20,654.04/28,501.20 = 11,222.40/x
  3. Step 3: Cross multiply
    20,654.04x = 28,501.20 × 11,222.40
  4. Step 4: Simplify right side
    20,654.04x = 319,851,866.88
  5. Step 5: Solve for x
    x = 319,851,866.88/20,654.04
  6. Step 6: Final answer
    x = 15,486.16

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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.