Home / 15,492.80-21,379.95-8,419.28

Finding the Fourth Proportional to 15,492.80, 21,379.95 and 8,419.28

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Solution

The fourth proportional to 15,492.80, 21,379.95 and 8,419.28 is: 11,618.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.80 : 21,379.95 = 8,419.28 : x
  2. Step 2: Convert to fraction form
    15,492.80/21,379.95 = 8,419.28/x
  3. Step 3: Cross multiply
    15,492.80x = 21,379.95 × 8,419.28
  4. Step 4: Simplify right side
    15,492.80x = 180,003,678.54
  5. Step 5: Solve for x
    x = 180,003,678.54/15,492.80
  6. Step 6: Final answer
    x = 11,618.54

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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.