Home / 15,851.46-21,874.95-8,681.41

Finding the Fourth Proportional to 15,851.46, 21,874.95 and 8,681.41

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Solution

The fourth proportional to 15,851.46, 21,874.95 and 8,681.41 is: 11,980.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,851.46 : 21,874.95 = 8,681.41 : x
  2. Step 2: Convert to fraction form
    15,851.46/21,874.95 = 8,681.41/x
  3. Step 3: Cross multiply
    15,851.46x = 21,874.95 × 8,681.41
  4. Step 4: Simplify right side
    15,851.46x = 189,905,354.99
  5. Step 5: Solve for x
    x = 189,905,354.99/15,851.46
  6. Step 6: Final answer
    x = 11,980.31

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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.