Home / 21,744.19-30,006.14-12,312.78

Finding the Fourth Proportional to 21,744.19, 30,006.14 and 12,312.78

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Solution

The fourth proportional to 21,744.19, 30,006.14 and 12,312.78 is: 16,991.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,744.19 : 30,006.14 = 12,312.78 : x
  2. Step 2: Convert to fraction form
    21,744.19/30,006.14 = 12,312.78/x
  3. Step 3: Cross multiply
    21,744.19x = 30,006.14 × 12,312.78
  4. Step 4: Simplify right side
    21,744.19x = 369,459,000.47
  5. Step 5: Solve for x
    x = 369,459,000.47/21,744.19
  6. Step 6: Final answer
    x = 16,991.16

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1.5x scale

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.