Home / 21,748.30-30,012.65-12,316.86

Finding the Fourth Proportional to 21,748.30, 30,012.65 and 12,316.86

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Solution

The fourth proportional to 21,748.30, 30,012.65 and 12,316.86 is: 16,997.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,748.30 : 30,012.65 = 12,316.86 : x
  2. Step 2: Convert to fraction form
    21,748.30/30,012.65 = 12,316.86/x
  3. Step 3: Cross multiply
    21,748.30x = 30,012.65 × 12,316.86
  4. Step 4: Simplify right side
    21,748.30x = 369,661,639.07
  5. Step 5: Solve for x
    x = 369,661,639.07/21,748.30
  6. Step 6: Final answer
    x = 16,997.27

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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.