Home / 20,653.57-28,502.04-12,156.01

Finding the Fourth Proportional to 20,653.57, 28,502.04 and 12,156.01

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Solution

The fourth proportional to 20,653.57, 28,502.04 and 12,156.01 is: 16,775.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.57 : 28,502.04 = 12,156.01 : x
  2. Step 2: Convert to fraction form
    20,653.57/28,502.04 = 12,156.01/x
  3. Step 3: Cross multiply
    20,653.57x = 28,502.04 × 12,156.01
  4. Step 4: Simplify right side
    20,653.57x = 346,471,083.26
  5. Step 5: Solve for x
    x = 346,471,083.26/20,653.57
  6. Step 6: Final answer
    x = 16,775.36

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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.