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Finding the Fourth Proportional to 28,675.35, 42,999.05 and 12,030.86

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Solution

The fourth proportional to 28,675.35, 42,999.05 and 12,030.86 is: 18,040.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,675.35 : 42,999.05 = 12,030.86 : x
  2. Step 2: Convert to fraction form
    28,675.35/42,999.05 = 12,030.86/x
  3. Step 3: Cross multiply
    28,675.35x = 42,999.05 × 12,030.86
  4. Step 4: Simplify right side
    28,675.35x = 517,315,688.26
  5. Step 5: Solve for x
    x = 517,315,688.26/28,675.35
  6. Step 6: Final answer
    x = 18,040.43

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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.