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Finding the Fourth Proportional to 28,888.90, 43,347.11 and 20,017.91

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Solution

The fourth proportional to 28,888.90, 43,347.11 and 20,017.91 is: 30,036.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,888.90 : 43,347.11 = 20,017.91 : x
  2. Step 2: Convert to fraction form
    28,888.90/43,347.11 = 20,017.91/x
  3. Step 3: Cross multiply
    28,888.90x = 43,347.11 × 20,017.91
  4. Step 4: Simplify right side
    28,888.90x = 867,718,546.74
  5. Step 5: Solve for x
    x = 867,718,546.74/28,888.90
  6. Step 6: Final answer
    x = 30,036.40

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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.