Home / 20,971.93-31,457.90-14,378.13

Finding the Fourth Proportional to 20,971.93, 31,457.90 and 14,378.13

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Solution

The fourth proportional to 20,971.93, 31,457.90 and 14,378.13 is: 21,567.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.93 : 31,457.90 = 14,378.13 : x
  2. Step 2: Convert to fraction form
    20,971.93/31,457.90 = 14,378.13/x
  3. Step 3: Cross multiply
    20,971.93x = 31,457.90 × 14,378.13
  4. Step 4: Simplify right side
    20,971.93x = 452,305,775.73
  5. Step 5: Solve for x
    x = 452,305,775.73/20,971.93
  6. Step 6: Final answer
    x = 21,567.20

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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.