Home / 13,290.51-18,340.91-7,985.31

Finding the Fourth Proportional to 13,290.51, 18,340.91 and 7,985.31

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Solution

The fourth proportional to 13,290.51, 18,340.91 and 7,985.31 is: 11,019.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.51 : 18,340.91 = 7,985.31 : x
  2. Step 2: Convert to fraction form
    13,290.51/18,340.91 = 7,985.31/x
  3. Step 3: Cross multiply
    13,290.51x = 18,340.91 × 7,985.31
  4. Step 4: Simplify right side
    13,290.51x = 146,457,812.11
  5. Step 5: Solve for x
    x = 146,457,812.11/13,290.51
  6. Step 6: Final answer
    x = 11,019.73

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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.