Home / 20,579.72-28,400.02-11,148.28

Finding the Fourth Proportional to 20,579.72, 28,400.02 and 11,148.28

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Solution

The fourth proportional to 20,579.72, 28,400.02 and 11,148.28 is: 15,384.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.72 : 28,400.02 = 11,148.28 : x
  2. Step 2: Convert to fraction form
    20,579.72/28,400.02 = 11,148.28/x
  3. Step 3: Cross multiply
    20,579.72x = 28,400.02 × 11,148.28
  4. Step 4: Simplify right side
    20,579.72x = 316,611,276.09
  5. Step 5: Solve for x
    x = 316,611,276.09/20,579.72
  6. Step 6: Final answer
    x = 15,384.63

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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.