Home / 15,390.92-21,239.48-8,317.35

Finding the Fourth Proportional to 15,390.92, 21,239.48 and 8,317.35

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Solution

The fourth proportional to 15,390.92, 21,239.48 and 8,317.35 is: 11,477.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.92 : 21,239.48 = 8,317.35 : x
  2. Step 2: Convert to fraction form
    15,390.92/21,239.48 = 8,317.35/x
  3. Step 3: Cross multiply
    15,390.92x = 21,239.48 × 8,317.35
  4. Step 4: Simplify right side
    15,390.92x = 176,656,209.77
  5. Step 5: Solve for x
    x = 176,656,209.77/15,390.92
  6. Step 6: Final answer
    x = 11,477.95

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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.