Home / 28,010.40-38,653.92-15,435.60

Finding the Fourth Proportional to 28,010.40, 38,653.92 and 15,435.60

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Solution

The fourth proportional to 28,010.40, 38,653.92 and 15,435.60 is: 21,300.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,010.40 : 38,653.92 = 15,435.60 : x
  2. Step 2: Convert to fraction form
    28,010.40/38,653.92 = 15,435.60/x
  3. Step 3: Cross multiply
    28,010.40x = 38,653.92 × 15,435.60
  4. Step 4: Simplify right side
    28,010.40x = 596,646,447.55
  5. Step 5: Solve for x
    x = 596,646,447.55/28,010.40
  6. Step 6: Final answer
    x = 21,300.89

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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.