Home / 15,494.04-21,381.48-8,420.40

Finding the Fourth Proportional to 15,494.04, 21,381.48 and 8,420.40

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Solution

The fourth proportional to 15,494.04, 21,381.48 and 8,420.40 is: 11,619.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.04 : 21,381.48 = 8,420.40 : x
  2. Step 2: Convert to fraction form
    15,494.04/21,381.48 = 8,420.40/x
  3. Step 3: Cross multiply
    15,494.04x = 21,381.48 × 8,420.40
  4. Step 4: Simplify right side
    15,494.04x = 180,040,614.19
  5. Step 5: Solve for x
    x = 180,040,614.19/15,494.04
  6. Step 6: Final answer
    x = 11,619.99

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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.