Home / 15,324.48-21,123.80-12,814.88

Finding the Fourth Proportional to 15,324.48, 21,123.80 and 12,814.88

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Solution

The fourth proportional to 15,324.48, 21,123.80 and 12,814.88 is: 17,664.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,324.48 : 21,123.80 = 12,814.88 : x
  2. Step 2: Convert to fraction form
    15,324.48/21,123.80 = 12,814.88/x
  3. Step 3: Cross multiply
    15,324.48x = 21,123.80 × 12,814.88
  4. Step 4: Simplify right side
    15,324.48x = 270,698,962.14
  5. Step 5: Solve for x
    x = 270,698,962.14/15,324.48
  6. Step 6: Final answer
    x = 17,664.48

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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.