Home / 12,980.68-17,920.22-10,400.35

Finding the Fourth Proportional to 12,980.68, 17,920.22 and 10,400.35

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Solution

The fourth proportional to 12,980.68, 17,920.22 and 10,400.35 is: 14,358.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,980.68 : 17,920.22 = 10,400.35 : x
  2. Step 2: Convert to fraction form
    12,980.68/17,920.22 = 10,400.35/x
  3. Step 3: Cross multiply
    12,980.68x = 17,920.22 × 10,400.35
  4. Step 4: Simplify right side
    12,980.68x = 186,376,560.08
  5. Step 5: Solve for x
    x = 186,376,560.08/12,980.68
  6. Step 6: Final answer
    x = 14,358.00

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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.