Home / 20,862.37-28,785.40-11,907.01

Finding the Fourth Proportional to 20,862.37, 28,785.40 and 11,907.01

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Solution

The fourth proportional to 20,862.37, 28,785.40 and 11,907.01 is: 16,429.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.37 : 28,785.40 = 11,907.01 : x
  2. Step 2: Convert to fraction form
    20,862.37/28,785.40 = 11,907.01/x
  3. Step 3: Cross multiply
    20,862.37x = 28,785.40 × 11,907.01
  4. Step 4: Simplify right side
    20,862.37x = 342,748,045.65
  5. Step 5: Solve for x
    x = 342,748,045.65/20,862.37
  6. Step 6: Final answer
    x = 16,429.01

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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.