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Finding the Fourth Proportional to 9,871, 14,806.50 and 2,575

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Solution

The fourth proportional to 9,871, 14,806.50 and 2,575 is: 3,862.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,871 : 14,806.50 = 2,575 : x
  2. Step 2: Convert to fraction form
    9,871/14,806.50 = 2,575/x
  3. Step 3: Cross multiply
    9,871x = 14,806.50 × 2,575
  4. Step 4: Simplify right side
    9,871x = 38,126,737.50
  5. Step 5: Solve for x
    x = 38,126,737.50/9,871
  6. Step 6: Final answer
    x = 3,862.50

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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.