Home / 14,267.90-19,689.70-7,980.28

Finding the Fourth Proportional to 14,267.90, 19,689.70 and 7,980.28

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Solution

The fourth proportional to 14,267.90, 19,689.70 and 7,980.28 is: 11,012.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,267.90 : 19,689.70 = 7,980.28 : x
  2. Step 2: Convert to fraction form
    14,267.90/19,689.70 = 7,980.28/x
  3. Step 3: Cross multiply
    14,267.90x = 19,689.70 × 7,980.28
  4. Step 4: Simplify right side
    14,267.90x = 157,129,319.12
  5. Step 5: Solve for x
    x = 157,129,319.12/14,267.90
  6. Step 6: Final answer
    x = 11,012.79

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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.