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Finding the Fourth Proportional to 28,762.96, 39,692.88 and 16,187.68

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Solution

The fourth proportional to 28,762.96, 39,692.88 and 16,187.68 is: 22,339.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,762.96 : 39,692.88 = 16,187.68 : x
  2. Step 2: Convert to fraction form
    28,762.96/39,692.88 = 16,187.68/x
  3. Step 3: Cross multiply
    28,762.96x = 39,692.88 × 16,187.68
  4. Step 4: Simplify right side
    28,762.96x = 642,535,639.72
  5. Step 5: Solve for x
    x = 642,535,639.72/28,762.96
  6. Step 6: Final answer
    x = 22,339.00

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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.