Home / 15,515.49-21,404.43-10,478.10

Finding the Fourth Proportional to 15,515.49, 21,404.43 and 10,478.10

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Solution

The fourth proportional to 15,515.49, 21,404.43 and 10,478.10 is: 14,455.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.49 : 21,404.43 = 10,478.10 : x
  2. Step 2: Convert to fraction form
    15,515.49/21,404.43 = 10,478.10/x
  3. Step 3: Cross multiply
    15,515.49x = 21,404.43 × 10,478.10
  4. Step 4: Simplify right side
    15,515.49x = 224,277,757.98
  5. Step 5: Solve for x
    x = 224,277,757.98/15,515.49
  6. Step 6: Final answer
    x = 14,455.09

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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.