Home / 10,920.73-15,055.35-9,235.36

Finding the Fourth Proportional to 10,920.73, 15,055.35 and 9,235.36

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Solution

The fourth proportional to 10,920.73, 15,055.35 and 9,235.36 is: 12,731.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.73 : 15,055.35 = 9,235.36 : x
  2. Step 2: Convert to fraction form
    10,920.73/15,055.35 = 9,235.36/x
  3. Step 3: Cross multiply
    10,920.73x = 15,055.35 × 9,235.36
  4. Step 4: Simplify right side
    10,920.73x = 139,041,577.18
  5. Step 5: Solve for x
    x = 139,041,577.18/10,920.73
  6. Step 6: Final answer
    x = 12,731.89

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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.