Home / 15,835.76-21,860.04-9,870.36

Finding the Fourth Proportional to 15,835.76, 21,860.04 and 9,870.36

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Solution

The fourth proportional to 15,835.76, 21,860.04 and 9,870.36 is: 13,625.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,835.76 : 21,860.04 = 9,870.36 : x
  2. Step 2: Convert to fraction form
    15,835.76/21,860.04 = 9,870.36/x
  3. Step 3: Cross multiply
    15,835.76x = 21,860.04 × 9,870.36
  4. Step 4: Simplify right side
    15,835.76x = 215,766,464.41
  5. Step 5: Solve for x
    x = 215,766,464.41/15,835.76
  6. Step 6: Final answer
    x = 13,625.27

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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.