Home / 12,938.64-19,411.38-7,012.91

Finding the Fourth Proportional to 12,938.64, 19,411.38 and 7,012.91

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Solution

The fourth proportional to 12,938.64, 19,411.38 and 7,012.91 is: 10,521.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.64 : 19,411.38 = 7,012.91 : x
  2. Step 2: Convert to fraction form
    12,938.64/19,411.38 = 7,012.91/x
  3. Step 3: Cross multiply
    12,938.64x = 19,411.38 × 7,012.91
  4. Step 4: Simplify right side
    12,938.64x = 136,130,163.86
  5. Step 5: Solve for x
    x = 136,130,163.86/12,938.64
  6. Step 6: Final answer
    x = 10,521.21

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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.