Home / 20,438.04-28,207-11,485.92

Finding the Fourth Proportional to 20,438.04, 28,207 and 11,485.92

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Solution

The fourth proportional to 20,438.04, 28,207 and 11,485.92 is: 15,851.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.04 : 28,207 = 11,485.92 : x
  2. Step 2: Convert to fraction form
    20,438.04/28,207 = 11,485.92/x
  3. Step 3: Cross multiply
    20,438.04x = 28,207 × 11,485.92
  4. Step 4: Simplify right side
    20,438.04x = 323,983,345.44
  5. Step 5: Solve for x
    x = 323,983,345.44/20,438.04
  6. Step 6: Final answer
    x = 15,851.98

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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.