Home / 21,125.65-29,145.09-13,570.93

Finding the Fourth Proportional to 21,125.65, 29,145.09 and 13,570.93

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Solution

The fourth proportional to 21,125.65, 29,145.09 and 13,570.93 is: 18,722.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.65 : 29,145.09 = 13,570.93 : x
  2. Step 2: Convert to fraction form
    21,125.65/29,145.09 = 13,570.93/x
  3. Step 3: Cross multiply
    21,125.65x = 29,145.09 × 13,570.93
  4. Step 4: Simplify right side
    21,125.65x = 395,525,976.23
  5. Step 5: Solve for x
    x = 395,525,976.23/21,125.65
  6. Step 6: Final answer
    x = 18,722.55

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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.