Home / 15,443.53-21,314.36-9,778.80

Finding the Fourth Proportional to 15,443.53, 21,314.36 and 9,778.80

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Solution

The fourth proportional to 15,443.53, 21,314.36 and 9,778.80 is: 13,496.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,443.53 : 21,314.36 = 9,778.80 : x
  2. Step 2: Convert to fraction form
    15,443.53/21,314.36 = 9,778.80/x
  3. Step 3: Cross multiply
    15,443.53x = 21,314.36 × 9,778.80
  4. Step 4: Simplify right side
    15,443.53x = 208,428,931.27
  5. Step 5: Solve for x
    x = 208,428,931.27/15,443.53
  6. Step 6: Final answer
    x = 13,496.20

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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.