Home / 18,684,280.78-28,012,970.20-11,480,931.55

Finding the Fourth Proportional to 18,684,280.78, 28,012,970.20 and 11,480,931.55

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Solution

The fourth proportional to 18,684,280.78, 28,012,970.20 and 11,480,931.55 is: 17,213,132.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,684,280.78 : 28,012,970.20 = 11,480,931.55 : x
  2. Step 2: Convert to fraction form
    18,684,280.78/28,012,970.20 = 11,480,931.55/x
  3. Step 3: Cross multiply
    18,684,280.78x = 28,012,970.20 × 11,480,931.55
  4. Step 4: Simplify right side
    18,684,280.78x = 321,614,993,378,389.81
  5. Step 5: Solve for x
    x = 321,614,993,378,389.81/18,684,280.78
  6. Step 6: Final answer
    x = 17,213,132.11

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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.