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Finding the Fourth Proportional to 28,615.06, 42,888.03 and 12,164.50

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Solution

The fourth proportional to 28,615.06, 42,888.03 and 12,164.50 is: 18,232.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.06 : 42,888.03 = 12,164.50 : x
  2. Step 2: Convert to fraction form
    28,615.06/42,888.03 = 12,164.50/x
  3. Step 3: Cross multiply
    28,615.06x = 42,888.03 × 12,164.50
  4. Step 4: Simplify right side
    28,615.06x = 521,711,440.94
  5. Step 5: Solve for x
    x = 521,711,440.94/28,615.06
  6. Step 6: Final answer
    x = 18,232.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.