Home / 38,779.16-53,520.25-21,783.40

Finding the Fourth Proportional to 38,779.16, 53,520.25 and 21,783.40

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Solution

The fourth proportional to 38,779.16, 53,520.25 and 21,783.40 is: 30,063.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,779.16 : 53,520.25 = 21,783.40 : x
  2. Step 2: Convert to fraction form
    38,779.16/53,520.25 = 21,783.40/x
  3. Step 3: Cross multiply
    38,779.16x = 53,520.25 × 21,783.40
  4. Step 4: Simplify right side
    38,779.16x = 1,165,853,095.06
  5. Step 5: Solve for x
    x = 1,165,853,095.06/38,779.16
  6. Step 6: Final answer
    x = 30,063.91

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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.