Home / 28,899.12-39,880.64-15,651.12

Finding the Fourth Proportional to 28,899.12, 39,880.64 and 15,651.12

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Solution

The fourth proportional to 28,899.12, 39,880.64 and 15,651.12 is: 21,598.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,899.12 : 39,880.64 = 15,651.12 : x
  2. Step 2: Convert to fraction form
    28,899.12/39,880.64 = 15,651.12/x
  3. Step 3: Cross multiply
    28,899.12x = 39,880.64 × 15,651.12
  4. Step 4: Simplify right side
    28,899.12x = 624,176,682.32
  5. Step 5: Solve for x
    x = 624,176,682.32/28,899.12
  6. Step 6: Final answer
    x = 21,598.47

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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.