Home / 15,678.36-21,628.82-9,707.85

Finding the Fourth Proportional to 15,678.36, 21,628.82 and 9,707.85

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Solution

The fourth proportional to 15,678.36, 21,628.82 and 9,707.85 is: 13,392.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.36 : 21,628.82 = 9,707.85 : x
  2. Step 2: Convert to fraction form
    15,678.36/21,628.82 = 9,707.85/x
  3. Step 3: Cross multiply
    15,678.36x = 21,628.82 × 9,707.85
  4. Step 4: Simplify right side
    15,678.36x = 209,969,364.51
  5. Step 5: Solve for x
    x = 209,969,364.51/15,678.36
  6. Step 6: Final answer
    x = 13,392.30

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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.