Home / 12,555.51-17,327.10-6,890.46

Finding the Fourth Proportional to 12,555.51, 17,327.10 and 6,890.46

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Solution

The fourth proportional to 12,555.51, 17,327.10 and 6,890.46 is: 9,509.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,555.51 : 17,327.10 = 6,890.46 : x
  2. Step 2: Convert to fraction form
    12,555.51/17,327.10 = 6,890.46/x
  3. Step 3: Cross multiply
    12,555.51x = 17,327.10 × 6,890.46
  4. Step 4: Simplify right side
    12,555.51x = 119,391,689.47
  5. Step 5: Solve for x
    x = 119,391,689.47/12,555.51
  6. Step 6: Final answer
    x = 9,509.11

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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.