Home / 28,330.56-39,075.84-20,779.20

Finding the Fourth Proportional to 28,330.56, 39,075.84 and 20,779.20

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Solution

The fourth proportional to 28,330.56, 39,075.84 and 20,779.20 is: 28,660.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,330.56 : 39,075.84 = 20,779.20 : x
  2. Step 2: Convert to fraction form
    28,330.56/39,075.84 = 20,779.20/x
  3. Step 3: Cross multiply
    28,330.56x = 39,075.84 × 20,779.20
  4. Step 4: Simplify right side
    28,330.56x = 811,964,694.53
  5. Step 5: Solve for x
    x = 811,964,694.53/28,330.56
  6. Step 6: Final answer
    x = 28,660.38

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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.