Home / 20,817.56-28,718.16-12,317.36

Finding the Fourth Proportional to 20,817.56, 28,718.16 and 12,317.36

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Solution

The fourth proportional to 20,817.56, 28,718.16 and 12,317.36 is: 16,992.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.56 : 28,718.16 = 12,317.36 : x
  2. Step 2: Convert to fraction form
    20,817.56/28,718.16 = 12,317.36/x
  3. Step 3: Cross multiply
    20,817.56x = 28,718.16 × 12,317.36
  4. Step 4: Simplify right side
    20,817.56x = 353,731,915.26
  5. Step 5: Solve for x
    x = 353,731,915.26/20,817.56
  6. Step 6: Final answer
    x = 16,992.00

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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.