Home / 21,748.55-30,011.85-12,316.50

Finding the Fourth Proportional to 21,748.55, 30,011.85 and 12,316.50

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Solution

The fourth proportional to 21,748.55, 30,011.85 and 12,316.50 is: 16,996.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,748.55 : 30,011.85 = 12,316.50 : x
  2. Step 2: Convert to fraction form
    21,748.55/30,011.85 = 12,316.50/x
  3. Step 3: Cross multiply
    21,748.55x = 30,011.85 × 12,316.50
  4. Step 4: Simplify right side
    21,748.55x = 369,640,950.53
  5. Step 5: Solve for x
    x = 369,640,950.53/21,748.55
  6. Step 6: Final answer
    x = 16,996.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.