Home / 12,688.86-19,012.32-4,364.40

Finding the Fourth Proportional to 12,688.86, 19,012.32 and 4,364.40

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Solution

The fourth proportional to 12,688.86, 19,012.32 and 4,364.40 is: 6,539.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.86 : 19,012.32 = 4,364.40 : x
  2. Step 2: Convert to fraction form
    12,688.86/19,012.32 = 4,364.40/x
  3. Step 3: Cross multiply
    12,688.86x = 19,012.32 × 4,364.40
  4. Step 4: Simplify right side
    12,688.86x = 82,977,369.41
  5. Step 5: Solve for x
    x = 82,977,369.41/12,688.86
  6. Step 6: Final answer
    x = 6,539.39

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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.