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Finding the Fourth Proportional to 28,666.16, 39,559.02 and 15,919.02

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Solution

The fourth proportional to 28,666.16, 39,559.02 and 15,919.02 is: 21,968.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,666.16 : 39,559.02 = 15,919.02 : x
  2. Step 2: Convert to fraction form
    28,666.16/39,559.02 = 15,919.02/x
  3. Step 3: Cross multiply
    28,666.16x = 39,559.02 × 15,919.02
  4. Step 4: Simplify right side
    28,666.16x = 629,740,830.56
  5. Step 5: Solve for x
    x = 629,740,830.56/28,666.16
  6. Step 6: Final answer
    x = 21,968.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.