Home / 13,715.80-18,927.66-7,428.10

Finding the Fourth Proportional to 13,715.80, 18,927.66 and 7,428.10

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Solution

The fourth proportional to 13,715.80, 18,927.66 and 7,428.10 is: 10,250.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,715.80 : 18,927.66 = 7,428.10 : x
  2. Step 2: Convert to fraction form
    13,715.80/18,927.66 = 7,428.10/x
  3. Step 3: Cross multiply
    13,715.80x = 18,927.66 × 7,428.10
  4. Step 4: Simplify right side
    13,715.80x = 140,596,551.25
  5. Step 5: Solve for x
    x = 140,596,551.25/13,715.80
  6. Step 6: Final answer
    x = 10,250.70

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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.