Home / 13,421.58-18,530.55-8,719.26

Finding the Fourth Proportional to 13,421.58, 18,530.55 and 8,719.26

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Solution

The fourth proportional to 13,421.58, 18,530.55 and 8,719.26 is: 12,038.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.58 : 18,530.55 = 8,719.26 : x
  2. Step 2: Convert to fraction form
    13,421.58/18,530.55 = 8,719.26/x
  3. Step 3: Cross multiply
    13,421.58x = 18,530.55 × 8,719.26
  4. Step 4: Simplify right side
    13,421.58x = 161,572,683.39
  5. Step 5: Solve for x
    x = 161,572,683.39/13,421.58
  6. Step 6: Final answer
    x = 12,038.28

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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.