Home / 21,828.48-30,124.80-12,398.08

Finding the Fourth Proportional to 21,828.48, 30,124.80 and 12,398.08

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Solution

The fourth proportional to 21,828.48, 30,124.80 and 12,398.08 is: 17,110.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,828.48 : 30,124.80 = 12,398.08 : x
  2. Step 2: Convert to fraction form
    21,828.48/30,124.80 = 12,398.08/x
  3. Step 3: Cross multiply
    21,828.48x = 30,124.80 × 12,398.08
  4. Step 4: Simplify right side
    21,828.48x = 373,489,680.38
  5. Step 5: Solve for x
    x = 373,489,680.38/21,828.48
  6. Step 6: Final answer
    x = 17,110.20

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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.