Home / 21,320.04-29,405.79-15,653.01

Finding the Fourth Proportional to 21,320.04, 29,405.79 and 15,653.01

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Solution

The fourth proportional to 21,320.04, 29,405.79 and 15,653.01 is: 21,589.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.04 : 29,405.79 = 15,653.01 : x
  2. Step 2: Convert to fraction form
    21,320.04/29,405.79 = 15,653.01/x
  3. Step 3: Cross multiply
    21,320.04x = 29,405.79 × 15,653.01
  4. Step 4: Simplify right side
    21,320.04x = 460,289,124.93
  5. Step 5: Solve for x
    x = 460,289,124.93/21,320.04
  6. Step 6: Final answer
    x = 21,589.51

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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.