Home / 21,089.28-29,106.12-12,136.62

Finding the Fourth Proportional to 21,089.28, 29,106.12 and 12,136.62

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Solution

The fourth proportional to 21,089.28, 29,106.12 and 12,136.62 is: 16,750.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,089.28 : 29,106.12 = 12,136.62 : x
  2. Step 2: Convert to fraction form
    21,089.28/29,106.12 = 12,136.62/x
  3. Step 3: Cross multiply
    21,089.28x = 29,106.12 × 12,136.62
  4. Step 4: Simplify right side
    21,089.28x = 353,249,918.11
  5. Step 5: Solve for x
    x = 353,249,918.11/21,089.28
  6. Step 6: Final answer
    x = 16,750.21

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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.