Home / 38,779.23-53,511.56-21,779.63

Finding the Fourth Proportional to 38,779.23, 53,511.56 and 21,779.63

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Solution

The fourth proportional to 38,779.23, 53,511.56 and 21,779.63 is: 30,053.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,779.23 : 53,511.56 = 21,779.63 : x
  2. Step 2: Convert to fraction form
    38,779.23/53,511.56 = 21,779.63/x
  3. Step 3: Cross multiply
    38,779.23x = 53,511.56 × 21,779.63
  4. Step 4: Simplify right side
    38,779.23x = 1,165,461,601.07
  5. Step 5: Solve for x
    x = 1,165,461,601.07/38,779.23
  6. Step 6: Final answer
    x = 30,053.76

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Double scale
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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.