Home / 21,931.49-30,263.62-12,977.43

Finding the Fourth Proportional to 21,931.49, 30,263.62 and 12,977.43

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Solution

The fourth proportional to 21,931.49, 30,263.62 and 12,977.43 is: 17,907.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.49 : 30,263.62 = 12,977.43 : x
  2. Step 2: Convert to fraction form
    21,931.49/30,263.62 = 12,977.43/x
  3. Step 3: Cross multiply
    21,931.49x = 30,263.62 × 12,977.43
  4. Step 4: Simplify right side
    21,931.49x = 392,744,010.10
  5. Step 5: Solve for x
    x = 392,744,010.10/21,931.49
  6. Step 6: Final answer
    x = 17,907.77

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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.