Home / 15,678.45-21,634.80-9,303.94

Finding the Fourth Proportional to 15,678.45, 21,634.80 and 9,303.94

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Solution

The fourth proportional to 15,678.45, 21,634.80 and 9,303.94 is: 12,838.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.45 : 21,634.80 = 9,303.94 : x
  2. Step 2: Convert to fraction form
    15,678.45/21,634.80 = 9,303.94/x
  3. Step 3: Cross multiply
    15,678.45x = 21,634.80 × 9,303.94
  4. Step 4: Simplify right side
    15,678.45x = 201,288,871.29
  5. Step 5: Solve for x
    x = 201,288,871.29/15,678.45
  6. Step 6: Final answer
    x = 12,838.57

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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.