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Finding the Fourth Proportional to 15,492.87, 21,405.21 and 10,798.11

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Solution

The fourth proportional to 15,492.87, 21,405.21 and 10,798.11 is: 14,918.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.87 : 21,405.21 = 10,798.11 : x
  2. Step 2: Convert to fraction form
    15,492.87/21,405.21 = 10,798.11/x
  3. Step 3: Cross multiply
    15,492.87x = 21,405.21 × 10,798.11
  4. Step 4: Simplify right side
    15,492.87x = 231,135,812.15
  5. Step 5: Solve for x
    x = 231,135,812.15/15,492.87
  6. Step 6: Final answer
    x = 14,918.85

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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.