Home / 13,149.93-19,631.18-12,688.53

Finding the Fourth Proportional to 13,149.93, 19,631.18 and 12,688.53

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Solution

The fourth proportional to 13,149.93, 19,631.18 and 12,688.53 is: 18,942.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.93 : 19,631.18 = 12,688.53 : x
  2. Step 2: Convert to fraction form
    13,149.93/19,631.18 = 12,688.53/x
  3. Step 3: Cross multiply
    13,149.93x = 19,631.18 × 12,688.53
  4. Step 4: Simplify right side
    13,149.93x = 249,090,752.92
  5. Step 5: Solve for x
    x = 249,090,752.92/13,149.93
  6. Step 6: Final answer
    x = 18,942.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.