Home / 12,378.48-18,554.76-4,981.20

Finding the Fourth Proportional to 12,378.48, 18,554.76 and 4,981.20

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Solution

The fourth proportional to 12,378.48, 18,554.76 and 4,981.20 is: 7,466.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.48 : 18,554.76 = 4,981.20 : x
  2. Step 2: Convert to fraction form
    12,378.48/18,554.76 = 4,981.20/x
  3. Step 3: Cross multiply
    12,378.48x = 18,554.76 × 4,981.20
  4. Step 4: Simplify right side
    12,378.48x = 92,424,970.51
  5. Step 5: Solve for x
    x = 92,424,970.51/12,378.48
  6. Step 6: Final answer
    x = 7,466.58

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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.