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Finding the Fourth Proportional to 15,650.76, 23,354.79 and 13,989

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Solution

The fourth proportional to 15,650.76, 23,354.79 and 13,989 is: 20,875.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,650.76 : 23,354.79 = 13,989 : x
  2. Step 2: Convert to fraction form
    15,650.76/23,354.79 = 13,989/x
  3. Step 3: Cross multiply
    15,650.76x = 23,354.79 × 13,989
  4. Step 4: Simplify right side
    15,650.76x = 326,710,157.31
  5. Step 5: Solve for x
    x = 326,710,157.31/15,650.76
  6. Step 6: Final answer
    x = 20,875.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.