Home / 53,081.28-79,621.93-13,638.40

Finding the Fourth Proportional to 53,081.28, 79,621.93 and 13,638.40

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Solution

The fourth proportional to 53,081.28, 79,621.93 and 13,638.40 is: 20,457.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,081.28 : 79,621.93 = 13,638.40 : x
  2. Step 2: Convert to fraction form
    53,081.28/79,621.93 = 13,638.40/x
  3. Step 3: Cross multiply
    53,081.28x = 79,621.93 × 13,638.40
  4. Step 4: Simplify right side
    53,081.28x = 1,085,915,332.00
  5. Step 5: Solve for x
    x = 1,085,915,332.00/53,081.28
  6. Step 6: Final answer
    x = 20,457.59

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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.