Home / 28,064.56-38,728.76-15,489.04

Finding the Fourth Proportional to 28,064.56, 38,728.76 and 15,489.04

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Solution

The fourth proportional to 28,064.56, 38,728.76 and 15,489.04 is: 21,374.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,064.56 : 38,728.76 = 15,489.04 : x
  2. Step 2: Convert to fraction form
    28,064.56/38,728.76 = 15,489.04/x
  3. Step 3: Cross multiply
    28,064.56x = 38,728.76 × 15,489.04
  4. Step 4: Simplify right side
    28,064.56x = 599,871,312.79
  5. Step 5: Solve for x
    x = 599,871,312.79/28,064.56
  6. Step 6: Final answer
    x = 21,374.69

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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.