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Finding the Fourth Proportional to 18,823.60, 28,238.01 and 6,347.20

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Solution

The fourth proportional to 18,823.60, 28,238.01 and 6,347.20 is: 9,521.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,823.60 : 28,238.01 = 6,347.20 : x
  2. Step 2: Convert to fraction form
    18,823.60/28,238.01 = 6,347.20/x
  3. Step 3: Cross multiply
    18,823.60x = 28,238.01 × 6,347.20
  4. Step 4: Simplify right side
    18,823.60x = 179,232,124.15
  5. Step 5: Solve for x
    x = 179,232,124.15/18,823.60
  6. Step 6: Final answer
    x = 9,521.67

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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.