Home / 21,421.68-29,546.66-13,038.72

Finding the Fourth Proportional to 21,421.68, 29,546.66 and 13,038.72

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Solution

The fourth proportional to 21,421.68, 29,546.66 and 13,038.72 is: 17,984.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.68 : 29,546.66 = 13,038.72 : x
  2. Step 2: Convert to fraction form
    21,421.68/29,546.66 = 13,038.72/x
  3. Step 3: Cross multiply
    21,421.68x = 29,546.66 × 13,038.72
  4. Step 4: Simplify right side
    21,421.68x = 385,250,626.68
  5. Step 5: Solve for x
    x = 385,250,626.68/21,421.68
  6. Step 6: Final answer
    x = 17,984.15

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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.