Home / 21,219.45-31,838.39-8,075.58

Finding the Fourth Proportional to 21,219.45, 31,838.39 and 8,075.58

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Solution

The fourth proportional to 21,219.45, 31,838.39 and 8,075.58 is: 12,116.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.45 : 31,838.39 = 8,075.58 : x
  2. Step 2: Convert to fraction form
    21,219.45/31,838.39 = 8,075.58/x
  3. Step 3: Cross multiply
    21,219.45x = 31,838.39 × 8,075.58
  4. Step 4: Simplify right side
    21,219.45x = 257,113,465.52
  5. Step 5: Solve for x
    x = 257,113,465.52/21,219.45
  6. Step 6: Final answer
    x = 12,116.88

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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.