Home / 28,569.79-42,861.53-11,920.58

Finding the Fourth Proportional to 28,569.79, 42,861.53 and 11,920.58

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Solution

The fourth proportional to 28,569.79, 42,861.53 and 11,920.58 is: 17,883.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,569.79 : 42,861.53 = 11,920.58 : x
  2. Step 2: Convert to fraction form
    28,569.79/42,861.53 = 11,920.58/x
  3. Step 3: Cross multiply
    28,569.79x = 42,861.53 × 11,920.58
  4. Step 4: Simplify right side
    28,569.79x = 510,934,297.29
  5. Step 5: Solve for x
    x = 510,934,297.29/28,569.79
  6. Step 6: Final answer
    x = 17,883.73

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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.