Home / 21,619.90-29,805.81-13,658.14

Finding the Fourth Proportional to 21,619.90, 29,805.81 and 13,658.14

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Solution

The fourth proportional to 21,619.90, 29,805.81 and 13,658.14 is: 18,829.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.90 : 29,805.81 = 13,658.14 : x
  2. Step 2: Convert to fraction form
    21,619.90/29,805.81 = 13,658.14/x
  3. Step 3: Cross multiply
    21,619.90x = 29,805.81 × 13,658.14
  4. Step 4: Simplify right side
    21,619.90x = 407,091,925.79
  5. Step 5: Solve for x
    x = 407,091,925.79/21,619.90
  6. Step 6: Final answer
    x = 18,829.50

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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.