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Finding the Fourth Proportional to 28,113.12, 38,798.12 and 16,783.08

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Solution

The fourth proportional to 28,113.12, 38,798.12 and 16,783.08 is: 23,161.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,113.12 : 38,798.12 = 16,783.08 : x
  2. Step 2: Convert to fraction form
    28,113.12/38,798.12 = 16,783.08/x
  3. Step 3: Cross multiply
    28,113.12x = 38,798.12 × 16,783.08
  4. Step 4: Simplify right side
    28,113.12x = 651,151,951.81
  5. Step 5: Solve for x
    x = 651,151,951.81/28,113.12
  6. Step 6: Final answer
    x = 23,161.85

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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.