Home / 15,449.08-21,318.57-10,420.12

Finding the Fourth Proportional to 15,449.08, 21,318.57 and 10,420.12

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Solution

The fourth proportional to 15,449.08, 21,318.57 and 10,420.12 is: 14,378.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,449.08 : 21,318.57 = 10,420.12 : x
  2. Step 2: Convert to fraction form
    15,449.08/21,318.57 = 10,420.12/x
  3. Step 3: Cross multiply
    15,449.08x = 21,318.57 × 10,420.12
  4. Step 4: Simplify right side
    15,449.08x = 222,142,057.63
  5. Step 5: Solve for x
    x = 222,142,057.63/15,449.08
  6. Step 6: Final answer
    x = 14,378.98

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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.