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Finding the Fourth Proportional to 15,069.59, 20,795.93 and 8,355.21

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Solution

The fourth proportional to 15,069.59, 20,795.93 and 8,355.21 is: 11,530.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,069.59 : 20,795.93 = 8,355.21 : x
  2. Step 2: Convert to fraction form
    15,069.59/20,795.93 = 8,355.21/x
  3. Step 3: Cross multiply
    15,069.59x = 20,795.93 × 8,355.21
  4. Step 4: Simplify right side
    15,069.59x = 173,754,398.50
  5. Step 5: Solve for x
    x = 173,754,398.50/15,069.59
  6. Step 6: Final answer
    x = 11,530.14

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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.