Home / 13,430.34-20,118.08-6,389.05

Finding the Fourth Proportional to 13,430.34, 20,118.08 and 6,389.05

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Solution

The fourth proportional to 13,430.34, 20,118.08 and 6,389.05 is: 9,570.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,430.34 : 20,118.08 = 6,389.05 : x
  2. Step 2: Convert to fraction form
    13,430.34/20,118.08 = 6,389.05/x
  3. Step 3: Cross multiply
    13,430.34x = 20,118.08 × 6,389.05
  4. Step 4: Simplify right side
    13,430.34x = 128,535,419.02
  5. Step 5: Solve for x
    x = 128,535,419.02/13,430.34
  6. Step 6: Final answer
    x = 9,570.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.