Home / 21,895.04-30,204.33-12,938.21

Finding the Fourth Proportional to 21,895.04, 30,204.33 and 12,938.21

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Solution

The fourth proportional to 21,895.04, 30,204.33 and 12,938.21 is: 17,848.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,895.04 : 30,204.33 = 12,938.21 : x
  2. Step 2: Convert to fraction form
    21,895.04/30,204.33 = 12,938.21/x
  3. Step 3: Cross multiply
    21,895.04x = 30,204.33 × 12,938.21
  4. Step 4: Simplify right side
    21,895.04x = 390,789,964.45
  5. Step 5: Solve for x
    x = 390,789,964.45/21,895.04
  6. Step 6: Final answer
    x = 17,848.33

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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.