Home / 7,140.39-9,851.35-4,155.59

Finding the Fourth Proportional to 7,140.39, 9,851.35 and 4,155.59

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Solution

The fourth proportional to 7,140.39, 9,851.35 and 4,155.59 is: 5,733.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.39 : 9,851.35 = 4,155.59 : x
  2. Step 2: Convert to fraction form
    7,140.39/9,851.35 = 4,155.59/x
  3. Step 3: Cross multiply
    7,140.39x = 9,851.35 × 4,155.59
  4. Step 4: Simplify right side
    7,140.39x = 40,938,159.23
  5. Step 5: Solve for x
    x = 40,938,159.23/7,140.39
  6. Step 6: Final answer
    x = 5,733.32

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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.