Home / 28,569.32-42,871.72-13,779.76

Finding the Fourth Proportional to 28,569.32, 42,871.72 and 13,779.76

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Solution

The fourth proportional to 28,569.32, 42,871.72 and 13,779.76 is: 20,678.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,569.32 : 42,871.72 = 13,779.76 : x
  2. Step 2: Convert to fraction form
    28,569.32/42,871.72 = 13,779.76/x
  3. Step 3: Cross multiply
    28,569.32x = 42,871.72 × 13,779.76
  4. Step 4: Simplify right side
    28,569.32x = 590,762,012.39
  5. Step 5: Solve for x
    x = 590,762,012.39/28,569.32
  6. Step 6: Final answer
    x = 20,678.20

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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.