Home / 18,931.72-28,376.34-6,440.08

Finding the Fourth Proportional to 18,931.72, 28,376.34 and 6,440.08

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Solution

The fourth proportional to 18,931.72, 28,376.34 and 6,440.08 is: 9,652.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.72 : 28,376.34 = 6,440.08 : x
  2. Step 2: Convert to fraction form
    18,931.72/28,376.34 = 6,440.08/x
  3. Step 3: Cross multiply
    18,931.72x = 28,376.34 × 6,440.08
  4. Step 4: Simplify right side
    18,931.72x = 182,745,899.71
  5. Step 5: Solve for x
    x = 182,745,899.71/18,931.72
  6. Step 6: Final answer
    x = 9,652.89

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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.