Home / 21,320.42-29,406.31-15,653.39

Finding the Fourth Proportional to 21,320.42, 29,406.31 and 15,653.39

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Solution

The fourth proportional to 21,320.42, 29,406.31 and 15,653.39 is: 21,590.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.42 : 29,406.31 = 15,653.39 : x
  2. Step 2: Convert to fraction form
    21,320.42/29,406.31 = 15,653.39/x
  3. Step 3: Cross multiply
    21,320.42x = 29,406.31 × 15,653.39
  4. Step 4: Simplify right side
    21,320.42x = 460,308,252.73
  5. Step 5: Solve for x
    x = 460,308,252.73/21,320.42
  6. Step 6: Final answer
    x = 21,590.02

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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.