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Finding the Fourth Proportional to 28,520.67, 42,768.74 and 9,802.58

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Solution

The fourth proportional to 28,520.67, 42,768.74 and 9,802.58 is: 14,699.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.67 : 42,768.74 = 9,802.58 : x
  2. Step 2: Convert to fraction form
    28,520.67/42,768.74 = 9,802.58/x
  3. Step 3: Cross multiply
    28,520.67x = 42,768.74 × 9,802.58
  4. Step 4: Simplify right side
    28,520.67x = 419,243,946.34
  5. Step 5: Solve for x
    x = 419,243,946.34/28,520.67
  6. Step 6: Final answer
    x = 14,699.66

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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.