Home / 18,956.79-28,438.56-6,478.20

Finding the Fourth Proportional to 18,956.79, 28,438.56 and 6,478.20

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Solution

The fourth proportional to 18,956.79, 28,438.56 and 6,478.20 is: 9,718.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,956.79 : 28,438.56 = 6,478.20 : x
  2. Step 2: Convert to fraction form
    18,956.79/28,438.56 = 6,478.20/x
  3. Step 3: Cross multiply
    18,956.79x = 28,438.56 × 6,478.20
  4. Step 4: Simplify right side
    18,956.79x = 184,230,679.39
  5. Step 5: Solve for x
    x = 184,230,679.39/18,956.79
  6. Step 6: Final answer
    x = 9,718.45

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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.