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Finding the Fourth Proportional to 47,988.94, 72,021.90 and 21,695.95

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Solution

The fourth proportional to 47,988.94, 72,021.90 and 21,695.95 is: 32,561.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,988.94 : 72,021.90 = 21,695.95 : x
  2. Step 2: Convert to fraction form
    47,988.94/72,021.90 = 21,695.95/x
  3. Step 3: Cross multiply
    47,988.94x = 72,021.90 × 21,695.95
  4. Step 4: Simplify right side
    47,988.94x = 1,562,583,541.31
  5. Step 5: Solve for x
    x = 1,562,583,541.31/47,988.94
  6. Step 6: Final answer
    x = 32,561.33

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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.