Home / 18,830.02-28,254.31-13,318.78

Finding the Fourth Proportional to 18,830.02, 28,254.31 and 13,318.78

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Solution

The fourth proportional to 18,830.02, 28,254.31 and 13,318.78 is: 19,984.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,830.02 : 28,254.31 = 13,318.78 : x
  2. Step 2: Convert to fraction form
    18,830.02/28,254.31 = 13,318.78/x
  3. Step 3: Cross multiply
    18,830.02x = 28,254.31 × 13,318.78
  4. Step 4: Simplify right side
    18,830.02x = 376,312,938.94
  5. Step 5: Solve for x
    x = 376,312,938.94/18,830.02
  6. Step 6: Final answer
    x = 19,984.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.