Home / 28,518.72-42,732.96-20,690.88

Finding the Fourth Proportional to 28,518.72, 42,732.96 and 20,690.88

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Solution

The fourth proportional to 28,518.72, 42,732.96 and 20,690.88 is: 31,003.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,518.72 : 42,732.96 = 20,690.88 : x
  2. Step 2: Convert to fraction form
    28,518.72/42,732.96 = 20,690.88/x
  3. Step 3: Cross multiply
    28,518.72x = 42,732.96 × 20,690.88
  4. Step 4: Simplify right side
    28,518.72x = 884,182,547.40
  5. Step 5: Solve for x
    x = 884,182,547.40/28,518.72
  6. Step 6: Final answer
    x = 31,003.58

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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.