Home / 21,918.60-30,247.06-12,358.40

Finding the Fourth Proportional to 21,918.60, 30,247.06 and 12,358.40

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Solution

The fourth proportional to 21,918.60, 30,247.06 and 12,358.40 is: 17,054.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918.60 : 30,247.06 = 12,358.40 : x
  2. Step 2: Convert to fraction form
    21,918.60/30,247.06 = 12,358.40/x
  3. Step 3: Cross multiply
    21,918.60x = 30,247.06 × 12,358.40
  4. Step 4: Simplify right side
    21,918.60x = 373,805,266.30
  5. Step 5: Solve for x
    x = 373,805,266.30/21,918.60
  6. Step 6: Final answer
    x = 17,054.25

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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.