Home / 15,421.51-21,281.79-8,347.95

Finding the Fourth Proportional to 15,421.51, 21,281.79 and 8,347.95

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Solution

The fourth proportional to 15,421.51, 21,281.79 and 8,347.95 is: 11,520.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.51 : 21,281.79 = 8,347.95 : x
  2. Step 2: Convert to fraction form
    15,421.51/21,281.79 = 8,347.95/x
  3. Step 3: Cross multiply
    15,421.51x = 21,281.79 × 8,347.95
  4. Step 4: Simplify right side
    15,421.51x = 177,659,318.83
  5. Step 5: Solve for x
    x = 177,659,318.83/15,421.51
  6. Step 6: Final answer
    x = 11,520.23

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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.