Home / 21,114.72-29,111.84-13,547.70

Finding the Fourth Proportional to 21,114.72, 29,111.84 and 13,547.70

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Solution

The fourth proportional to 21,114.72, 29,111.84 and 13,547.70 is: 18,678.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.72 : 29,111.84 = 13,547.70 : x
  2. Step 2: Convert to fraction form
    21,114.72/29,111.84 = 13,547.70/x
  3. Step 3: Cross multiply
    21,114.72x = 29,111.84 × 13,547.70
  4. Step 4: Simplify right side
    21,114.72x = 394,398,474.77
  5. Step 5: Solve for x
    x = 394,398,474.77/21,114.72
  6. Step 6: Final answer
    x = 18,678.84

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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.