Home / 13,693.04-18,905.64-8,985.32

Finding the Fourth Proportional to 13,693.04, 18,905.64 and 8,985.32

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Solution

The fourth proportional to 13,693.04, 18,905.64 and 8,985.32 is: 12,405.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,693.04 : 18,905.64 = 8,985.32 : x
  2. Step 2: Convert to fraction form
    13,693.04/18,905.64 = 8,985.32/x
  3. Step 3: Cross multiply
    13,693.04x = 18,905.64 × 8,985.32
  4. Step 4: Simplify right side
    13,693.04x = 169,873,225.20
  5. Step 5: Solve for x
    x = 169,873,225.20/13,693.04
  6. Step 6: Final answer
    x = 12,405.81

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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.