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Finding the Fourth Proportional to 28,673.96, 42,987.25 and 12,652.08

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Solution

The fourth proportional to 28,673.96, 42,987.25 and 12,652.08 is: 18,967.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,673.96 : 42,987.25 = 12,652.08 : x
  2. Step 2: Convert to fraction form
    28,673.96/42,987.25 = 12,652.08/x
  3. Step 3: Cross multiply
    28,673.96x = 42,987.25 × 12,652.08
  4. Step 4: Simplify right side
    28,673.96x = 543,878,151.23
  5. Step 5: Solve for x
    x = 543,878,151.23/28,673.96
  6. Step 6: Final answer
    x = 18,967.67

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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.