Home / 20,302.63-28,018.02-11,350.78

Finding the Fourth Proportional to 20,302.63, 28,018.02 and 11,350.78

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Solution

The fourth proportional to 20,302.63, 28,018.02 and 11,350.78 is: 15,664.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,302.63 : 28,018.02 = 11,350.78 : x
  2. Step 2: Convert to fraction form
    20,302.63/28,018.02 = 11,350.78/x
  3. Step 3: Cross multiply
    20,302.63x = 28,018.02 × 11,350.78
  4. Step 4: Simplify right side
    20,302.63x = 318,026,381.06
  5. Step 5: Solve for x
    x = 318,026,381.06/20,302.63
  6. Step 6: Final answer
    x = 15,664.29

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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.