Home / 10,918.57-15,070.05-6,938.90

Finding the Fourth Proportional to 10,918.57, 15,070.05 and 6,938.90

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Solution

The fourth proportional to 10,918.57, 15,070.05 and 6,938.90 is: 9,577.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,918.57 : 15,070.05 = 6,938.90 : x
  2. Step 2: Convert to fraction form
    10,918.57/15,070.05 = 6,938.90/x
  3. Step 3: Cross multiply
    10,918.57x = 15,070.05 × 6,938.90
  4. Step 4: Simplify right side
    10,918.57x = 104,569,535.25
  5. Step 5: Solve for x
    x = 104,569,535.25/10,918.57
  6. Step 6: Final answer
    x = 9,577.22

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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.