Home / 12,971.07-19,480.09-11,929.20

Finding the Fourth Proportional to 12,971.07, 19,480.09 and 11,929.20

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Solution

The fourth proportional to 12,971.07, 19,480.09 and 11,929.20 is: 17,915.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,971.07 : 19,480.09 = 11,929.20 : x
  2. Step 2: Convert to fraction form
    12,971.07/19,480.09 = 11,929.20/x
  3. Step 3: Cross multiply
    12,971.07x = 19,480.09 × 11,929.20
  4. Step 4: Simplify right side
    12,971.07x = 232,381,889.63
  5. Step 5: Solve for x
    x = 232,381,889.63/12,971.07
  6. Step 6: Final answer
    x = 17,915.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.