Home / 21,438.08-29,574.67-13,886.92

Finding the Fourth Proportional to 21,438.08, 29,574.67 and 13,886.92

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Solution

The fourth proportional to 21,438.08, 29,574.67 and 13,886.92 is: 19,157.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.08 : 29,574.67 = 13,886.92 : x
  2. Step 2: Convert to fraction form
    21,438.08/29,574.67 = 13,886.92/x
  3. Step 3: Cross multiply
    21,438.08x = 29,574.67 × 13,886.92
  4. Step 4: Simplify right side
    21,438.08x = 410,700,859.01
  5. Step 5: Solve for x
    x = 410,700,859.01/21,438.08
  6. Step 6: Final answer
    x = 19,157.54

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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.