Home / 13,862.18-19,128.26-7,812.70

Finding the Fourth Proportional to 13,862.18, 19,128.26 and 7,812.70

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Solution

The fourth proportional to 13,862.18, 19,128.26 and 7,812.70 is: 10,780.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,862.18 : 19,128.26 = 7,812.70 : x
  2. Step 2: Convert to fraction form
    13,862.18/19,128.26 = 7,812.70/x
  3. Step 3: Cross multiply
    13,862.18x = 19,128.26 × 7,812.70
  4. Step 4: Simplify right side
    13,862.18x = 149,443,328.61
  5. Step 5: Solve for x
    x = 149,443,328.61/13,862.18
  6. Step 6: Final answer
    x = 10,780.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.