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Finding the Fourth Proportional to 39,218.40, 58,852.80 and 21,700.80

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Solution

The fourth proportional to 39,218.40, 58,852.80 and 21,700.80 is: 32,565.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,218.40 : 58,852.80 = 21,700.80 : x
  2. Step 2: Convert to fraction form
    39,218.40/58,852.80 = 21,700.80/x
  3. Step 3: Cross multiply
    39,218.40x = 58,852.80 × 21,700.80
  4. Step 4: Simplify right side
    39,218.40x = 1,277,152,842.24
  5. Step 5: Solve for x
    x = 1,277,152,842.24/39,218.40
  6. Step 6: Final answer
    x = 32,565.14

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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.