Home / 15,768.48-21,779.88-11,807.28

Finding the Fourth Proportional to 15,768.48, 21,779.88 and 11,807.28

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Solution

The fourth proportional to 15,768.48, 21,779.88 and 11,807.28 is: 16,308.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,768.48 : 21,779.88 = 11,807.28 : x
  2. Step 2: Convert to fraction form
    15,768.48/21,779.88 = 11,807.28/x
  3. Step 3: Cross multiply
    15,768.48x = 21,779.88 × 11,807.28
  4. Step 4: Simplify right side
    15,768.48x = 257,161,141.53
  5. Step 5: Solve for x
    x = 257,161,141.53/15,768.48
  6. Step 6: Final answer
    x = 16,308.56

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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.