Home / 7,155.77-9,875.47-3,970.11

Finding the Fourth Proportional to 7,155.77, 9,875.47 and 3,970.11

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Solution

The fourth proportional to 7,155.77, 9,875.47 and 3,970.11 is: 5,479.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.77 : 9,875.47 = 3,970.11 : x
  2. Step 2: Convert to fraction form
    7,155.77/9,875.47 = 3,970.11/x
  3. Step 3: Cross multiply
    7,155.77x = 9,875.47 × 3,970.11
  4. Step 4: Simplify right side
    7,155.77x = 39,206,702.20
  5. Step 5: Solve for x
    x = 39,206,702.20/7,155.77
  6. Step 6: Final answer
    x = 5,479.03

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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.