Home / 21,938.04-30,282.36-12,985.62

Finding the Fourth Proportional to 21,938.04, 30,282.36 and 12,985.62

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Solution

The fourth proportional to 21,938.04, 30,282.36 and 12,985.62 is: 17,924.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,938.04 : 30,282.36 = 12,985.62 : x
  2. Step 2: Convert to fraction form
    21,938.04/30,282.36 = 12,985.62/x
  3. Step 3: Cross multiply
    21,938.04x = 30,282.36 × 12,985.62
  4. Step 4: Simplify right side
    21,938.04x = 393,235,057.41
  5. Step 5: Solve for x
    x = 393,235,057.41/21,938.04
  6. Step 6: Final answer
    x = 17,924.80

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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.