Home / 21,343.35-29,457.68-12,730.08

Finding the Fourth Proportional to 21,343.35, 29,457.68 and 12,730.08

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Solution

The fourth proportional to 21,343.35, 29,457.68 and 12,730.08 is: 17,569.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,343.35 : 29,457.68 = 12,730.08 : x
  2. Step 2: Convert to fraction form
    21,343.35/29,457.68 = 12,730.08/x
  3. Step 3: Cross multiply
    21,343.35x = 29,457.68 × 12,730.08
  4. Step 4: Simplify right side
    21,343.35x = 374,998,633.01
  5. Step 5: Solve for x
    x = 374,998,633.01/21,343.35
  6. Step 6: Final answer
    x = 17,569.81

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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.