Home / 15,420.93-21,281.84-8,704.11

Finding the Fourth Proportional to 15,420.93, 21,281.84 and 8,704.11

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Solution

The fourth proportional to 15,420.93, 21,281.84 and 8,704.11 is: 12,012.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.93 : 21,281.84 = 8,704.11 : x
  2. Step 2: Convert to fraction form
    15,420.93/21,281.84 = 8,704.11/x
  3. Step 3: Cross multiply
    15,420.93x = 21,281.84 × 8,704.11
  4. Step 4: Simplify right side
    15,420.93x = 185,239,476.36
  5. Step 5: Solve for x
    x = 185,239,476.36/15,420.93
  6. Step 6: Final answer
    x = 12,012.21

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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.