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Finding the Fourth Proportional to 38,999.80, 58,461.30 and 19,281.40

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Solution

The fourth proportional to 38,999.80, 58,461.30 and 19,281.40 is: 28,903.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,999.80 : 58,461.30 = 19,281.40 : x
  2. Step 2: Convert to fraction form
    38,999.80/58,461.30 = 19,281.40/x
  3. Step 3: Cross multiply
    38,999.80x = 58,461.30 × 19,281.40
  4. Step 4: Simplify right side
    38,999.80x = 1,127,215,709.82
  5. Step 5: Solve for x
    x = 1,127,215,709.82/38,999.80
  6. Step 6: Final answer
    x = 28,903.12

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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.