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Finding the Fourth Proportional to 20,307.60, 28,117.80 and 19,270.80

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Solution

The fourth proportional to 20,307.60, 28,117.80 and 19,270.80 is: 26,682.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,307.60 : 28,117.80 = 19,270.80 : x
  2. Step 2: Convert to fraction form
    20,307.60/28,117.80 = 19,270.80/x
  3. Step 3: Cross multiply
    20,307.60x = 28,117.80 × 19,270.80
  4. Step 4: Simplify right side
    20,307.60x = 541,852,500.24
  5. Step 5: Solve for x
    x = 541,852,500.24/20,307.60
  6. Step 6: Final answer
    x = 26,682.25

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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.