Home / 15,663.21-21,594.32-12,443.71

Finding the Fourth Proportional to 15,663.21, 21,594.32 and 12,443.71

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Solution

The fourth proportional to 15,663.21, 21,594.32 and 12,443.71 is: 17,155.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,663.21 : 21,594.32 = 12,443.71 : x
  2. Step 2: Convert to fraction form
    15,663.21/21,594.32 = 12,443.71/x
  3. Step 3: Cross multiply
    15,663.21x = 21,594.32 × 12,443.71
  4. Step 4: Simplify right side
    15,663.21x = 268,713,455.73
  5. Step 5: Solve for x
    x = 268,713,455.73/15,663.21
  6. Step 6: Final answer
    x = 17,155.71

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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.