Home / 12,018,931.20-18,023,021.64-8,638,956.72

Finding the Fourth Proportional to 12,018,931.20, 18,023,021.64 and 8,638,956.72

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Solution

The fourth proportional to 12,018,931.20, 18,023,021.64 and 8,638,956.72 is: 12,954,571.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,018,931.20 : 18,023,021.64 = 8,638,956.72 : x
  2. Step 2: Convert to fraction form
    12,018,931.20/18,023,021.64 = 8,638,956.72/x
  3. Step 3: Cross multiply
    12,018,931.20x = 18,023,021.64 × 8,638,956.72
  4. Step 4: Simplify right side
    12,018,931.20x = 155,700,103,911,583.44
  5. Step 5: Solve for x
    x = 155,700,103,911,583.44/12,018,931.20
  6. Step 6: Final answer
    x = 12,954,571.53

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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.