Home / 12,916.40-19,381-5,125.04

Finding the Fourth Proportional to 12,916.40, 19,381 and 5,125.04

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Solution

The fourth proportional to 12,916.40, 19,381 and 5,125.04 is: 7,690.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,916.40 : 19,381 = 5,125.04 : x
  2. Step 2: Convert to fraction form
    12,916.40/19,381 = 5,125.04/x
  3. Step 3: Cross multiply
    12,916.40x = 19,381 × 5,125.04
  4. Step 4: Simplify right side
    12,916.40x = 99,328,400.24
  5. Step 5: Solve for x
    x = 99,328,400.24/12,916.40
  6. Step 6: Final answer
    x = 7,690.10

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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.