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Finding the Fourth Proportional to 21,176.55, 28,500.86 and 21,176.55

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Solution

The fourth proportional to 21,176.55, 28,500.86 and 21,176.55 is: 28,500.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,176.55 : 28,500.86 = 21,176.55 : x
  2. Step 2: Convert to fraction form
    21,176.55/28,500.86 = 21,176.55/x
  3. Step 3: Cross multiply
    21,176.55x = 28,500.86 × 21,176.55
  4. Step 4: Simplify right side
    21,176.55x = 603,549,939.77
  5. Step 5: Solve for x
    x = 603,549,939.77/21,176.55
  6. Step 6: Final answer
    x = 28,500.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.