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Finding the Fourth Proportional to 21,498.65, 29,668.98 and 12,423.71

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Solution

The fourth proportional to 21,498.65, 29,668.98 and 12,423.71 is: 17,145.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,498.65 : 29,668.98 = 12,423.71 : x
  2. Step 2: Convert to fraction form
    21,498.65/29,668.98 = 12,423.71/x
  3. Step 3: Cross multiply
    21,498.65x = 29,668.98 × 12,423.71
  4. Step 4: Simplify right side
    21,498.65x = 368,598,803.52
  5. Step 5: Solve for x
    x = 368,598,803.52/21,498.65
  6. Step 6: Final answer
    x = 17,145.21

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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.