Home / 15,513.76-21,409.20-8,440.48

Finding the Fourth Proportional to 15,513.76, 21,409.20 and 8,440.48

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Solution

The fourth proportional to 15,513.76, 21,409.20 and 8,440.48 is: 11,647.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.76 : 21,409.20 = 8,440.48 : x
  2. Step 2: Convert to fraction form
    15,513.76/21,409.20 = 8,440.48/x
  3. Step 3: Cross multiply
    15,513.76x = 21,409.20 × 8,440.48
  4. Step 4: Simplify right side
    15,513.76x = 180,703,924.42
  5. Step 5: Solve for x
    x = 180,703,924.42/15,513.76
  6. Step 6: Final answer
    x = 11,647.98

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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.