Home / 15,392.28-21,237.42-9,421.80

Finding the Fourth Proportional to 15,392.28, 21,237.42 and 9,421.80

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Solution

The fourth proportional to 15,392.28, 21,237.42 and 9,421.80 is: 12,999.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,392.28 : 21,237.42 = 9,421.80 : x
  2. Step 2: Convert to fraction form
    15,392.28/21,237.42 = 9,421.80/x
  3. Step 3: Cross multiply
    15,392.28x = 21,237.42 × 9,421.80
  4. Step 4: Simplify right side
    15,392.28x = 200,094,723.76
  5. Step 5: Solve for x
    x = 200,094,723.76/15,392.28
  6. Step 6: Final answer
    x = 12,999.68

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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.