Home / 39,115.77-53,979.47-21,210.75

Finding the Fourth Proportional to 39,115.77, 53,979.47 and 21,210.75

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Solution

The fourth proportional to 39,115.77, 53,979.47 and 21,210.75 is: 29,270.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,115.77 : 53,979.47 = 21,210.75 : x
  2. Step 2: Convert to fraction form
    39,115.77/53,979.47 = 21,210.75/x
  3. Step 3: Cross multiply
    39,115.77x = 53,979.47 × 21,210.75
  4. Step 4: Simplify right side
    39,115.77x = 1,144,944,937.25
  5. Step 5: Solve for x
    x = 1,144,944,937.25/39,115.77
  6. Step 6: Final answer
    x = 29,270.67

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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.