Home / 28,430.12-42,663.64-12,847.88

Finding the Fourth Proportional to 28,430.12, 42,663.64 and 12,847.88

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Solution

The fourth proportional to 28,430.12, 42,663.64 and 12,847.88 is: 19,280.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.12 : 42,663.64 = 12,847.88 : x
  2. Step 2: Convert to fraction form
    28,430.12/42,663.64 = 12,847.88/x
  3. Step 3: Cross multiply
    28,430.12x = 42,663.64 × 12,847.88
  4. Step 4: Simplify right side
    28,430.12x = 548,137,327.08
  5. Step 5: Solve for x
    x = 548,137,327.08/28,430.12
  6. Step 6: Final answer
    x = 19,280.16

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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.