Home / 21,311.02-29,427.78-13,366.90

Finding the Fourth Proportional to 21,311.02, 29,427.78 and 13,366.90

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Solution

The fourth proportional to 21,311.02, 29,427.78 and 13,366.90 is: 18,457.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.02 : 29,427.78 = 13,366.90 : x
  2. Step 2: Convert to fraction form
    21,311.02/29,427.78 = 13,366.90/x
  3. Step 3: Cross multiply
    21,311.02x = 29,427.78 × 13,366.90
  4. Step 4: Simplify right side
    21,311.02x = 393,358,192.48
  5. Step 5: Solve for x
    x = 393,358,192.48/21,311.02
  6. Step 6: Final answer
    x = 18,457.97

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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.