Home / 13,631.04-18,810.40-7,662.72

Finding the Fourth Proportional to 13,631.04, 18,810.40 and 7,662.72

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Solution

The fourth proportional to 13,631.04, 18,810.40 and 7,662.72 is: 10,574.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.04 : 18,810.40 = 7,662.72 : x
  2. Step 2: Convert to fraction form
    13,631.04/18,810.40 = 7,662.72/x
  3. Step 3: Cross multiply
    13,631.04x = 18,810.40 × 7,662.72
  4. Step 4: Simplify right side
    13,631.04x = 144,138,828.29
  5. Step 5: Solve for x
    x = 144,138,828.29/13,631.04
  6. Step 6: Final answer
    x = 10,574.31

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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.