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Finding the Fourth Proportional to 28,168.48, 38,862.48 and 16,988.32

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Solution

The fourth proportional to 28,168.48, 38,862.48 and 16,988.32 is: 23,437.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,168.48 : 38,862.48 = 16,988.32 : x
  2. Step 2: Convert to fraction form
    28,168.48/38,862.48 = 16,988.32/x
  3. Step 3: Cross multiply
    28,168.48x = 38,862.48 × 16,988.32
  4. Step 4: Simplify right side
    28,168.48x = 660,208,246.23
  5. Step 5: Solve for x
    x = 660,208,246.23/28,168.48
  6. Step 6: Final answer
    x = 23,437.84

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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.