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Finding the Fourth Proportional to 28,184.40, 38,894.40 and 15,609.60

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Solution

The fourth proportional to 28,184.40, 38,894.40 and 15,609.60 is: 21,541.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,184.40 : 38,894.40 = 15,609.60 : x
  2. Step 2: Convert to fraction form
    28,184.40/38,894.40 = 15,609.60/x
  3. Step 3: Cross multiply
    28,184.40x = 38,894.40 × 15,609.60
  4. Step 4: Simplify right side
    28,184.40x = 607,126,026.24
  5. Step 5: Solve for x
    x = 607,126,026.24/28,184.40
  6. Step 6: Final answer
    x = 21,541.21

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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.