Home / 20,779.34-28,675.28-12,711.62

Finding the Fourth Proportional to 20,779.34, 28,675.28 and 12,711.62

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Solution

The fourth proportional to 20,779.34, 28,675.28 and 12,711.62 is: 17,541.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.34 : 28,675.28 = 12,711.62 : x
  2. Step 2: Convert to fraction form
    20,779.34/28,675.28 = 12,711.62/x
  3. Step 3: Cross multiply
    20,779.34x = 28,675.28 × 12,711.62
  4. Step 4: Simplify right side
    20,779.34x = 364,509,055.82
  5. Step 5: Solve for x
    x = 364,509,055.82/20,779.34
  6. Step 6: Final answer
    x = 17,541.90

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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.