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Finding the Fourth Proportional to 18,830.90, 28,239.12 and 6,347.55

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Solution

The fourth proportional to 18,830.90, 28,239.12 and 6,347.55 is: 9,518.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,830.90 : 28,239.12 = 6,347.55 : x
  2. Step 2: Convert to fraction form
    18,830.90/28,239.12 = 6,347.55/x
  3. Step 3: Cross multiply
    18,830.90x = 28,239.12 × 6,347.55
  4. Step 4: Simplify right side
    18,830.90x = 179,249,226.16
  5. Step 5: Solve for x
    x = 179,249,226.16/18,830.90
  6. Step 6: Final answer
    x = 9,518.89

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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.