Home / 15,455.48-21,328.74-8,381.96

Finding the Fourth Proportional to 15,455.48, 21,328.74 and 8,381.96

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Solution

The fourth proportional to 15,455.48, 21,328.74 and 8,381.96 is: 11,567.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.48 : 21,328.74 = 8,381.96 : x
  2. Step 2: Convert to fraction form
    15,455.48/21,328.74 = 8,381.96/x
  3. Step 3: Cross multiply
    15,455.48x = 21,328.74 × 8,381.96
  4. Step 4: Simplify right side
    15,455.48x = 178,776,645.53
  5. Step 5: Solve for x
    x = 178,776,645.53/15,455.48
  6. Step 6: Final answer
    x = 11,567.20

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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.