Home / 21,827.34-30,079.49-15,528.78

Finding the Fourth Proportional to 21,827.34, 30,079.49 and 15,528.78

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Solution

The fourth proportional to 21,827.34, 30,079.49 and 15,528.78 is: 21,399.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,827.34 : 30,079.49 = 15,528.78 : x
  2. Step 2: Convert to fraction form
    21,827.34/30,079.49 = 15,528.78/x
  3. Step 3: Cross multiply
    21,827.34x = 30,079.49 × 15,528.78
  4. Step 4: Simplify right side
    21,827.34x = 467,097,705.08
  5. Step 5: Solve for x
    x = 467,097,705.08/21,827.34
  6. Step 6: Final answer
    x = 21,399.66

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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.