Home / 21,893.40-30,213.65-12,948.57

Finding the Fourth Proportional to 21,893.40, 30,213.65 and 12,948.57

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Solution

The fourth proportional to 21,893.40, 30,213.65 and 12,948.57 is: 17,869.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,893.40 : 30,213.65 = 12,948.57 : x
  2. Step 2: Convert to fraction form
    21,893.40/30,213.65 = 12,948.57/x
  3. Step 3: Cross multiply
    21,893.40x = 30,213.65 × 12,948.57
  4. Step 4: Simplify right side
    21,893.40x = 391,223,497.24
  5. Step 5: Solve for x
    x = 391,223,497.24/21,893.40
  6. Step 6: Final answer
    x = 17,869.47

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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.