Home / 28,268.72-39,011.28-15,693.60

Finding the Fourth Proportional to 28,268.72, 39,011.28 and 15,693.60

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Solution

The fourth proportional to 28,268.72, 39,011.28 and 15,693.60 is: 21,657.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,268.72 : 39,011.28 = 15,693.60 : x
  2. Step 2: Convert to fraction form
    28,268.72/39,011.28 = 15,693.60/x
  3. Step 3: Cross multiply
    28,268.72x = 39,011.28 × 15,693.60
  4. Step 4: Simplify right side
    28,268.72x = 612,227,423.81
  5. Step 5: Solve for x
    x = 612,227,423.81/28,268.72
  6. Step 6: Final answer
    x = 21,657.42

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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.