Home / 13,762.04-18,999.66-9,981.56

Finding the Fourth Proportional to 13,762.04, 18,999.66 and 9,981.56

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Solution

The fourth proportional to 13,762.04, 18,999.66 and 9,981.56 is: 13,780.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,762.04 : 18,999.66 = 9,981.56 : x
  2. Step 2: Convert to fraction form
    13,762.04/18,999.66 = 9,981.56/x
  3. Step 3: Cross multiply
    13,762.04x = 18,999.66 × 9,981.56
  4. Step 4: Simplify right side
    13,762.04x = 189,646,331.20
  5. Step 5: Solve for x
    x = 189,646,331.20/13,762.04
  6. Step 6: Final answer
    x = 13,780.40

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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.