Home / 21,530.54-29,712.16-12,457.18

Finding the Fourth Proportional to 21,530.54, 29,712.16 and 12,457.18

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Solution

The fourth proportional to 21,530.54, 29,712.16 and 12,457.18 is: 17,190.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,530.54 : 29,712.16 = 12,457.18 : x
  2. Step 2: Convert to fraction form
    21,530.54/29,712.16 = 12,457.18/x
  3. Step 3: Cross multiply
    21,530.54x = 29,712.16 × 12,457.18
  4. Step 4: Simplify right side
    21,530.54x = 370,129,576.75
  5. Step 5: Solve for x
    x = 370,129,576.75/21,530.54
  6. Step 6: Final answer
    x = 17,190.91

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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.