Home / 12,904.20-17,807.70-7,315.40

Finding the Fourth Proportional to 12,904.20, 17,807.70 and 7,315.40

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Solution

The fourth proportional to 12,904.20, 17,807.70 and 7,315.40 is: 10,095.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,904.20 : 17,807.70 = 7,315.40 : x
  2. Step 2: Convert to fraction form
    12,904.20/17,807.70 = 7,315.40/x
  3. Step 3: Cross multiply
    12,904.20x = 17,807.70 × 7,315.40
  4. Step 4: Simplify right side
    12,904.20x = 130,270,448.58
  5. Step 5: Solve for x
    x = 130,270,448.58/12,904.20
  6. Step 6: Final answer
    x = 10,095.20

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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.