Home / 21,179.18-31,783.36-9,505.46

Finding the Fourth Proportional to 21,179.18, 31,783.36 and 9,505.46

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Solution

The fourth proportional to 21,179.18, 31,783.36 and 9,505.46 is: 14,264.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.18 : 31,783.36 = 9,505.46 : x
  2. Step 2: Convert to fraction form
    21,179.18/31,783.36 = 9,505.46/x
  3. Step 3: Cross multiply
    21,179.18x = 31,783.36 × 9,505.46
  4. Step 4: Simplify right side
    21,179.18x = 302,115,457.15
  5. Step 5: Solve for x
    x = 302,115,457.15/21,179.18
  6. Step 6: Final answer
    x = 14,264.74

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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.