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Finding the Fourth Proportional to 28,573.48, 42,870.48 and 12,777.16

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Solution

The fourth proportional to 28,573.48, 42,870.48 and 12,777.16 is: 19,170.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,573.48 : 42,870.48 = 12,777.16 : x
  2. Step 2: Convert to fraction form
    28,573.48/42,870.48 = 12,777.16/x
  3. Step 3: Cross multiply
    28,573.48x = 42,870.48 × 12,777.16
  4. Step 4: Simplify right side
    28,573.48x = 547,762,982.24
  5. Step 5: Solve for x
    x = 547,762,982.24/28,573.48
  6. Step 6: Final answer
    x = 19,170.33

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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.