Home / 42,779.30-64,115.48-20,586.71

Finding the Fourth Proportional to 42,779.30, 64,115.48 and 20,586.71

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Solution

The fourth proportional to 42,779.30, 64,115.48 and 20,586.71 is: 30,854.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,779.30 : 64,115.48 = 20,586.71 : x
  2. Step 2: Convert to fraction form
    42,779.30/64,115.48 = 20,586.71/x
  3. Step 3: Cross multiply
    42,779.30x = 64,115.48 × 20,586.71
  4. Step 4: Simplify right side
    42,779.30x = 1,319,927,005.03
  5. Step 5: Solve for x
    x = 1,319,927,005.03/42,779.30
  6. Step 6: Final answer
    x = 30,854.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.