Home / 15,358.08-21,192.40-8,643.57

Finding the Fourth Proportional to 15,358.08, 21,192.40 and 8,643.57

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Solution

The fourth proportional to 15,358.08, 21,192.40 and 8,643.57 is: 11,927.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,358.08 : 21,192.40 = 8,643.57 : x
  2. Step 2: Convert to fraction form
    15,358.08/21,192.40 = 8,643.57/x
  3. Step 3: Cross multiply
    15,358.08x = 21,192.40 × 8,643.57
  4. Step 4: Simplify right side
    15,358.08x = 183,177,992.87
  5. Step 5: Solve for x
    x = 183,177,992.87/15,358.08
  6. Step 6: Final answer
    x = 11,927.14

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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.