Home / 15,686.28-21,647.52-9,400.68

Finding the Fourth Proportional to 15,686.28, 21,647.52 and 9,400.68

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Solution

The fourth proportional to 15,686.28, 21,647.52 and 9,400.68 is: 12,973.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.28 : 21,647.52 = 9,400.68 : x
  2. Step 2: Convert to fraction form
    15,686.28/21,647.52 = 9,400.68/x
  3. Step 3: Cross multiply
    15,686.28x = 21,647.52 × 9,400.68
  4. Step 4: Simplify right side
    15,686.28x = 203,501,408.31
  5. Step 5: Solve for x
    x = 203,501,408.31/15,686.28
  6. Step 6: Final answer
    x = 12,973.21

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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.