Home / 10,485.81-14,486.31-7,828.61

Finding the Fourth Proportional to 10,485.81, 14,486.31 and 7,828.61

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Solution

The fourth proportional to 10,485.81, 14,486.31 and 7,828.61 is: 10,815.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,485.81 : 14,486.31 = 7,828.61 : x
  2. Step 2: Convert to fraction form
    10,485.81/14,486.31 = 7,828.61/x
  3. Step 3: Cross multiply
    10,485.81x = 14,486.31 × 7,828.61
  4. Step 4: Simplify right side
    10,485.81x = 113,407,598.90
  5. Step 5: Solve for x
    x = 113,407,598.90/10,485.81
  6. Step 6: Final answer
    x = 10,815.34

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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.