Home / 15,631.58-21,578.20-15,210.38

Finding the Fourth Proportional to 15,631.58, 21,578.20 and 15,210.38

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Solution

The fourth proportional to 15,631.58, 21,578.20 and 15,210.38 is: 20,996.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,631.58 : 21,578.20 = 15,210.38 : x
  2. Step 2: Convert to fraction form
    15,631.58/21,578.20 = 15,210.38/x
  3. Step 3: Cross multiply
    15,631.58x = 21,578.20 × 15,210.38
  4. Step 4: Simplify right side
    15,631.58x = 328,212,621.72
  5. Step 5: Solve for x
    x = 328,212,621.72/15,631.58
  6. Step 6: Final answer
    x = 20,996.77

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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.