Home / 20,926.65-28,865.99-12,423

Finding the Fourth Proportional to 20,926.65, 28,865.99 and 12,423

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Solution

The fourth proportional to 20,926.65, 28,865.99 and 12,423 is: 17,136.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.65 : 28,865.99 = 12,423 : x
  2. Step 2: Convert to fraction form
    20,926.65/28,865.99 = 12,423/x
  3. Step 3: Cross multiply
    20,926.65x = 28,865.99 × 12,423
  4. Step 4: Simplify right side
    20,926.65x = 358,602,131.66
  5. Step 5: Solve for x
    x = 358,602,131.66/20,926.65
  6. Step 6: Final answer
    x = 17,136.15

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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.