Home / 15,448.78-21,321.60-9,784.06

Finding the Fourth Proportional to 15,448.78, 21,321.60 and 9,784.06

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Solution

The fourth proportional to 15,448.78, 21,321.60 and 9,784.06 is: 13,503.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,448.78 : 21,321.60 = 9,784.06 : x
  2. Step 2: Convert to fraction form
    15,448.78/21,321.60 = 9,784.06/x
  3. Step 3: Cross multiply
    15,448.78x = 21,321.60 × 9,784.06
  4. Step 4: Simplify right side
    15,448.78x = 208,611,813.70
  5. Step 5: Solve for x
    x = 208,611,813.70/15,448.78
  6. Step 6: Final answer
    x = 13,503.45

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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.