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Finding the Fourth Proportional to 18,762.58, 28,135.56 and 5,612.50

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Solution

The fourth proportional to 18,762.58, 28,135.56 and 5,612.50 is: 8,416.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,762.58 : 28,135.56 = 5,612.50 : x
  2. Step 2: Convert to fraction form
    18,762.58/28,135.56 = 5,612.50/x
  3. Step 3: Cross multiply
    18,762.58x = 28,135.56 × 5,612.50
  4. Step 4: Simplify right side
    18,762.58x = 157,910,830.50
  5. Step 5: Solve for x
    x = 157,910,830.50/18,762.58
  6. Step 6: Final answer
    x = 8,416.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.