Home / 15,455.39-21,328.49-8,381.93

Finding the Fourth Proportional to 15,455.39, 21,328.49 and 8,381.93

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Solution

The fourth proportional to 15,455.39, 21,328.49 and 8,381.93 is: 11,567.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.39 : 21,328.49 = 8,381.93 : x
  2. Step 2: Convert to fraction form
    15,455.39/21,328.49 = 8,381.93/x
  3. Step 3: Cross multiply
    15,455.39x = 21,328.49 × 8,381.93
  4. Step 4: Simplify right side
    15,455.39x = 178,773,824.50
  5. Step 5: Solve for x
    x = 178,773,824.50/15,455.39
  6. Step 6: Final answer
    x = 11,567.09

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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.