Home / 21,897.04-30,207.09-12,940.21

Finding the Fourth Proportional to 21,897.04, 30,207.09 and 12,940.21

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Solution

The fourth proportional to 21,897.04, 30,207.09 and 12,940.21 is: 17,851.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,897.04 : 30,207.09 = 12,940.21 : x
  2. Step 2: Convert to fraction form
    21,897.04/30,207.09 = 12,940.21/x
  3. Step 3: Cross multiply
    21,897.04x = 30,207.09 × 12,940.21
  4. Step 4: Simplify right side
    21,897.04x = 390,886,088.09
  5. Step 5: Solve for x
    x = 390,886,088.09/21,897.04
  6. Step 6: Final answer
    x = 17,851.09

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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.