Home / 28,430.64-39,236.04-15,683.76

Finding the Fourth Proportional to 28,430.64, 39,236.04 and 15,683.76

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Solution

The fourth proportional to 28,430.64, 39,236.04 and 15,683.76 is: 21,644.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.64 : 39,236.04 = 15,683.76 : x
  2. Step 2: Convert to fraction form
    28,430.64/39,236.04 = 15,683.76/x
  3. Step 3: Cross multiply
    28,430.64x = 39,236.04 × 15,683.76
  4. Step 4: Simplify right side
    28,430.64x = 615,368,634.71
  5. Step 5: Solve for x
    x = 615,368,634.71/28,430.64
  6. Step 6: Final answer
    x = 21,644.56

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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.