Home / 12,782.40-17,639.28-7,192.32

Finding the Fourth Proportional to 12,782.40, 17,639.28 and 7,192.32

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Solution

The fourth proportional to 12,782.40, 17,639.28 and 7,192.32 is: 9,925.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,782.40 : 17,639.28 = 7,192.32 : x
  2. Step 2: Convert to fraction form
    12,782.40/17,639.28 = 7,192.32/x
  3. Step 3: Cross multiply
    12,782.40x = 17,639.28 × 7,192.32
  4. Step 4: Simplify right side
    12,782.40x = 126,867,346.33
  5. Step 5: Solve for x
    x = 126,867,346.33/12,782.40
  6. Step 6: Final answer
    x = 9,925.16

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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.