Home / 21,284.72-29,364.10-12,669.18

Finding the Fourth Proportional to 21,284.72, 29,364.10 and 12,669.18

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Solution

The fourth proportional to 21,284.72, 29,364.10 and 12,669.18 is: 17,478.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,284.72 : 29,364.10 = 12,669.18 : x
  2. Step 2: Convert to fraction form
    21,284.72/29,364.10 = 12,669.18/x
  3. Step 3: Cross multiply
    21,284.72x = 29,364.10 × 12,669.18
  4. Step 4: Simplify right side
    21,284.72x = 372,019,068.44
  5. Step 5: Solve for x
    x = 372,019,068.44/21,284.72
  6. Step 6: Final answer
    x = 17,478.22

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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.