Home / 21,423-32,134.50-9,111

Finding the Fourth Proportional to 21,423, 32,134.50 and 9,111

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Solution

The fourth proportional to 21,423, 32,134.50 and 9,111 is: 13,666.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,423 : 32,134.50 = 9,111 : x
  2. Step 2: Convert to fraction form
    21,423/32,134.50 = 9,111/x
  3. Step 3: Cross multiply
    21,423x = 32,134.50 × 9,111
  4. Step 4: Simplify right side
    21,423x = 292,777,429.50
  5. Step 5: Solve for x
    x = 292,777,429.50/21,423
  6. Step 6: Final answer
    x = 13,666.50

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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.