Home / 13,345.71-18,417-7,680.57

Finding the Fourth Proportional to 13,345.71, 18,417 and 7,680.57

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Solution

The fourth proportional to 13,345.71, 18,417 and 7,680.57 is: 10,599.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,345.71 : 18,417 = 7,680.57 : x
  2. Step 2: Convert to fraction form
    13,345.71/18,417 = 7,680.57/x
  3. Step 3: Cross multiply
    13,345.71x = 18,417 × 7,680.57
  4. Step 4: Simplify right side
    13,345.71x = 141,453,057.69
  5. Step 5: Solve for x
    x = 141,453,057.69/13,345.71
  6. Step 6: Final answer
    x = 10,599.14

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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.