Home / 15,455.10-21,328.20-8,740.80

Finding the Fourth Proportional to 15,455.10, 21,328.20 and 8,740.80

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Solution

The fourth proportional to 15,455.10, 21,328.20 and 8,740.80 is: 12,062.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.10 : 21,328.20 = 8,740.80 : x
  2. Step 2: Convert to fraction form
    15,455.10/21,328.20 = 8,740.80/x
  3. Step 3: Cross multiply
    15,455.10x = 21,328.20 × 8,740.80
  4. Step 4: Simplify right side
    15,455.10x = 186,425,530.56
  5. Step 5: Solve for x
    x = 186,425,530.56/15,455.10
  6. Step 6: Final answer
    x = 12,062.40

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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.