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Finding the Fourth Proportional to 58,656.40, 87,992.70 and 21,207.40

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Solution

The fourth proportional to 58,656.40, 87,992.70 and 21,207.40 is: 31,814.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,656.40 : 87,992.70 = 21,207.40 : x
  2. Step 2: Convert to fraction form
    58,656.40/87,992.70 = 21,207.40/x
  3. Step 3: Cross multiply
    58,656.40x = 87,992.70 × 21,207.40
  4. Step 4: Simplify right side
    58,656.40x = 1,866,096,385.98
  5. Step 5: Solve for x
    x = 1,866,096,385.98/58,656.40
  6. Step 6: Final answer
    x = 31,814.03

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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.