Home / 10,318.84-15,478.80-7,857.52

Finding the Fourth Proportional to 10,318.84, 15,478.80 and 7,857.52

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Solution

The fourth proportional to 10,318.84, 15,478.80 and 7,857.52 is: 11,786.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,318.84 : 15,478.80 = 7,857.52 : x
  2. Step 2: Convert to fraction form
    10,318.84/15,478.80 = 7,857.52/x
  3. Step 3: Cross multiply
    10,318.84x = 15,478.80 × 7,857.52
  4. Step 4: Simplify right side
    10,318.84x = 121,624,980.58
  5. Step 5: Solve for x
    x = 121,624,980.58/10,318.84
  6. Step 6: Final answer
    x = 11,786.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.