Home / 12,651.48-18,977-3,886.20

Finding the Fourth Proportional to 12,651.48, 18,977 and 3,886.20

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Solution

The fourth proportional to 12,651.48, 18,977 and 3,886.20 is: 5,829.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.48 : 18,977 = 3,886.20 : x
  2. Step 2: Convert to fraction form
    12,651.48/18,977 = 3,886.20/x
  3. Step 3: Cross multiply
    12,651.48x = 18,977 × 3,886.20
  4. Step 4: Simplify right side
    12,651.48x = 73,748,417.40
  5. Step 5: Solve for x
    x = 73,748,417.40/12,651.48
  6. Step 6: Final answer
    x = 5,829.23

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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.