Home / 15,487.82-21,390.81-10,443.38

Finding the Fourth Proportional to 15,487.82, 21,390.81 and 10,443.38

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Solution

The fourth proportional to 15,487.82, 21,390.81 and 10,443.38 is: 14,423.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,487.82 : 21,390.81 = 10,443.38 : x
  2. Step 2: Convert to fraction form
    15,487.82/21,390.81 = 10,443.38/x
  3. Step 3: Cross multiply
    15,487.82x = 21,390.81 × 10,443.38
  4. Step 4: Simplify right side
    15,487.82x = 223,392,357.34
  5. Step 5: Solve for x
    x = 223,392,357.34/15,487.82
  6. Step 6: Final answer
    x = 14,423.74

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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.