Home / 15,345.77-21,177.77-8,631.36

Finding the Fourth Proportional to 15,345.77, 21,177.77 and 8,631.36

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Solution

The fourth proportional to 15,345.77, 21,177.77 and 8,631.36 is: 11,911.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,345.77 : 21,177.77 = 8,631.36 : x
  2. Step 2: Convert to fraction form
    15,345.77/21,177.77 = 8,631.36/x
  3. Step 3: Cross multiply
    15,345.77x = 21,177.77 × 8,631.36
  4. Step 4: Simplify right side
    15,345.77x = 182,792,913.71
  5. Step 5: Solve for x
    x = 182,792,913.71/15,345.77
  6. Step 6: Final answer
    x = 11,911.62

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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.