Home / 21,099.14-29,129.45-13,152.13

Finding the Fourth Proportional to 21,099.14, 29,129.45 and 13,152.13

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Solution

The fourth proportional to 21,099.14, 29,129.45 and 13,152.13 is: 18,157.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,099.14 : 29,129.45 = 13,152.13 : x
  2. Step 2: Convert to fraction form
    21,099.14/29,129.45 = 13,152.13/x
  3. Step 3: Cross multiply
    21,099.14x = 29,129.45 × 13,152.13
  4. Step 4: Simplify right side
    21,099.14x = 383,114,313.23
  5. Step 5: Solve for x
    x = 383,114,313.23/21,099.14
  6. Step 6: Final answer
    x = 18,157.82

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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.