Home / 20,962.02-28,907.64-13,779.21

Finding the Fourth Proportional to 20,962.02, 28,907.64 and 13,779.21

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Solution

The fourth proportional to 20,962.02, 28,907.64 and 13,779.21 is: 19,002.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962.02 : 28,907.64 = 13,779.21 : x
  2. Step 2: Convert to fraction form
    20,962.02/28,907.64 = 13,779.21/x
  3. Step 3: Cross multiply
    20,962.02x = 28,907.64 × 13,779.21
  4. Step 4: Simplify right side
    20,962.02x = 398,324,442.16
  5. Step 5: Solve for x
    x = 398,324,442.16/20,962.02
  6. Step 6: Final answer
    x = 19,002.20

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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.