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Finding the Fourth Proportional to 19,291.35, 28,948.53 and 8,616.87

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Solution

The fourth proportional to 19,291.35, 28,948.53 and 8,616.87 is: 12,930.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,291.35 : 28,948.53 = 8,616.87 : x
  2. Step 2: Convert to fraction form
    19,291.35/28,948.53 = 8,616.87/x
  3. Step 3: Cross multiply
    19,291.35x = 28,948.53 × 8,616.87
  4. Step 4: Simplify right side
    19,291.35x = 249,445,719.70
  5. Step 5: Solve for x
    x = 249,445,719.70/19,291.35
  6. Step 6: Final answer
    x = 12,930.44

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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.