Home / 15,505.80-21,389.44-9,830.53

Finding the Fourth Proportional to 15,505.80, 21,389.44 and 9,830.53

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Solution

The fourth proportional to 15,505.80, 21,389.44 and 9,830.53 is: 13,560.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.80 : 21,389.44 = 9,830.53 : x
  2. Step 2: Convert to fraction form
    15,505.80/21,389.44 = 9,830.53/x
  3. Step 3: Cross multiply
    15,505.80x = 21,389.44 × 9,830.53
  4. Step 4: Simplify right side
    15,505.80x = 210,269,531.60
  5. Step 5: Solve for x
    x = 210,269,531.60/15,505.80
  6. Step 6: Final answer
    x = 13,560.70

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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.