Home / 15,357.80-21,193.90-8,643.40

Finding the Fourth Proportional to 15,357.80, 21,193.90 and 8,643.40

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Solution

The fourth proportional to 15,357.80, 21,193.90 and 8,643.40 is: 11,927.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,357.80 : 21,193.90 = 8,643.40 : x
  2. Step 2: Convert to fraction form
    15,357.80/21,193.90 = 8,643.40/x
  3. Step 3: Cross multiply
    15,357.80x = 21,193.90 × 8,643.40
  4. Step 4: Simplify right side
    15,357.80x = 183,187,355.26
  5. Step 5: Solve for x
    x = 183,187,355.26/15,357.80
  6. Step 6: Final answer
    x = 11,927.97

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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.