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Finding the Fourth Proportional to 28,510.88, 42,765.44 and 11,870.49

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Solution

The fourth proportional to 28,510.88, 42,765.44 and 11,870.49 is: 17,805.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,510.88 : 42,765.44 = 11,870.49 : x
  2. Step 2: Convert to fraction form
    28,510.88/42,765.44 = 11,870.49/x
  3. Step 3: Cross multiply
    28,510.88x = 42,765.44 × 11,870.49
  4. Step 4: Simplify right side
    28,510.88x = 507,646,727.87
  5. Step 5: Solve for x
    x = 507,646,727.87/28,510.88
  6. Step 6: Final answer
    x = 17,805.37

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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.