Home / 15,355.71-21,190.68-8,641.35

Finding the Fourth Proportional to 15,355.71, 21,190.68 and 8,641.35

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Solution

The fourth proportional to 15,355.71, 21,190.68 and 8,641.35 is: 11,924.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.71 : 21,190.68 = 8,641.35 : x
  2. Step 2: Convert to fraction form
    15,355.71/21,190.68 = 8,641.35/x
  3. Step 3: Cross multiply
    15,355.71x = 21,190.68 × 8,641.35
  4. Step 4: Simplify right side
    15,355.71x = 183,116,082.62
  5. Step 5: Solve for x
    x = 183,116,082.62/15,355.71
  6. Step 6: Final answer
    x = 11,924.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.