Home / 13,355.40-18,430.34-7,387.01

Finding the Fourth Proportional to 13,355.40, 18,430.34 and 7,387.01

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Solution

The fourth proportional to 13,355.40, 18,430.34 and 7,387.01 is: 10,194.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.40 : 18,430.34 = 7,387.01 : x
  2. Step 2: Convert to fraction form
    13,355.40/18,430.34 = 7,387.01/x
  3. Step 3: Cross multiply
    13,355.40x = 18,430.34 × 7,387.01
  4. Step 4: Simplify right side
    13,355.40x = 136,144,976.80
  5. Step 5: Solve for x
    x = 136,144,976.80/13,355.40
  6. Step 6: Final answer
    x = 10,194.00

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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.