Home / 31,075.34-42,865.62-21,990.46

Finding the Fourth Proportional to 31,075.34, 42,865.62 and 21,990.46

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Solution

The fourth proportional to 31,075.34, 42,865.62 and 21,990.46 is: 30,333.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,075.34 : 42,865.62 = 21,990.46 : x
  2. Step 2: Convert to fraction form
    31,075.34/42,865.62 = 21,990.46/x
  3. Step 3: Cross multiply
    31,075.34x = 42,865.62 × 21,990.46
  4. Step 4: Simplify right side
    31,075.34x = 942,634,701.99
  5. Step 5: Solve for x
    x = 942,634,701.99/31,075.34
  6. Step 6: Final answer
    x = 30,333.85

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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.