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Finding the Fourth Proportional to 15,595.94, 21,516.25 and 9,929.22

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Solution

The fourth proportional to 15,595.94, 21,516.25 and 9,929.22 is: 13,698.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,595.94 : 21,516.25 = 9,929.22 : x
  2. Step 2: Convert to fraction form
    15,595.94/21,516.25 = 9,929.22/x
  3. Step 3: Cross multiply
    15,595.94x = 21,516.25 × 9,929.22
  4. Step 4: Simplify right side
    15,595.94x = 213,639,579.83
  5. Step 5: Solve for x
    x = 213,639,579.83/15,595.94
  6. Step 6: Final answer
    x = 13,698.41

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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.