Home / 20,623.47-28,438.88-12,238.35

Finding the Fourth Proportional to 20,623.47, 28,438.88 and 12,238.35

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Solution

The fourth proportional to 20,623.47, 28,438.88 and 12,238.35 is: 16,876.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,623.47 : 28,438.88 = 12,238.35 : x
  2. Step 2: Convert to fraction form
    20,623.47/28,438.88 = 12,238.35/x
  3. Step 3: Cross multiply
    20,623.47x = 28,438.88 × 12,238.35
  4. Step 4: Simplify right side
    20,623.47x = 348,044,905.86
  5. Step 5: Solve for x
    x = 348,044,905.86/20,623.47
  6. Step 6: Final answer
    x = 16,876.16

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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.