Home / 15,478.11-21,345.08-10,443.15

Finding the Fourth Proportional to 15,478.11, 21,345.08 and 10,443.15

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Solution

The fourth proportional to 15,478.11, 21,345.08 and 10,443.15 is: 14,401.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.11 : 21,345.08 = 10,443.15 : x
  2. Step 2: Convert to fraction form
    15,478.11/21,345.08 = 10,443.15/x
  3. Step 3: Cross multiply
    15,478.11x = 21,345.08 × 10,443.15
  4. Step 4: Simplify right side
    15,478.11x = 222,909,819.99
  5. Step 5: Solve for x
    x = 222,909,819.99/15,478.11
  6. Step 6: Final answer
    x = 14,401.62

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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.