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Finding the Fourth Proportional to 15,649.76, 21,595.92 and 9,362.72

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Solution

The fourth proportional to 15,649.76, 21,595.92 and 9,362.72 is: 12,920.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,649.76 : 21,595.92 = 9,362.72 : x
  2. Step 2: Convert to fraction form
    15,649.76/21,595.92 = 9,362.72/x
  3. Step 3: Cross multiply
    15,649.76x = 21,595.92 × 9,362.72
  4. Step 4: Simplify right side
    15,649.76x = 202,196,552.10
  5. Step 5: Solve for x
    x = 202,196,552.10/15,649.76
  6. Step 6: Final answer
    x = 12,920.11

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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.