Home / 21,145.90-29,182.86-11,715.10

Finding the Fourth Proportional to 21,145.90, 29,182.86 and 11,715.10

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Solution

The fourth proportional to 21,145.90, 29,182.86 and 11,715.10 is: 16,167.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.90 : 29,182.86 = 11,715.10 : x
  2. Step 2: Convert to fraction form
    21,145.90/29,182.86 = 11,715.10/x
  3. Step 3: Cross multiply
    21,145.90x = 29,182.86 × 11,715.10
  4. Step 4: Simplify right side
    21,145.90x = 341,880,123.19
  5. Step 5: Solve for x
    x = 341,880,123.19/21,145.90
  6. Step 6: Final answer
    x = 16,167.68

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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.