Home / 15,503.28-21,393.93-8,429.70

Finding the Fourth Proportional to 15,503.28, 21,393.93 and 8,429.70

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Solution

The fourth proportional to 15,503.28, 21,393.93 and 8,429.70 is: 11,632.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.28 : 21,393.93 = 8,429.70 : x
  2. Step 2: Convert to fraction form
    15,503.28/21,393.93 = 8,429.70/x
  3. Step 3: Cross multiply
    15,503.28x = 21,393.93 × 8,429.70
  4. Step 4: Simplify right side
    15,503.28x = 180,344,411.72
  5. Step 5: Solve for x
    x = 180,344,411.72/15,503.28
  6. Step 6: Final answer
    x = 11,632.66

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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.