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Finding the Fourth Proportional to 28,230.30, 42,317.80 and 15,756.30

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Solution

The fourth proportional to 28,230.30, 42,317.80 and 15,756.30 is: 23,619.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,230.30 : 42,317.80 = 15,756.30 : x
  2. Step 2: Convert to fraction form
    28,230.30/42,317.80 = 15,756.30/x
  3. Step 3: Cross multiply
    28,230.30x = 42,317.80 × 15,756.30
  4. Step 4: Simplify right side
    28,230.30x = 666,771,952.14
  5. Step 5: Solve for x
    x = 666,771,952.14/28,230.30
  6. Step 6: Final answer
    x = 23,619.02

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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.