Home / 39,120.17-53,985.86-21,215.17

Finding the Fourth Proportional to 39,120.17, 53,985.86 and 21,215.17

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Solution

The fourth proportional to 39,120.17, 53,985.86 and 21,215.17 is: 29,276.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,120.17 : 53,985.86 = 21,215.17 : x
  2. Step 2: Convert to fraction form
    39,120.17/53,985.86 = 21,215.17/x
  3. Step 3: Cross multiply
    39,120.17x = 53,985.86 × 21,215.17
  4. Step 4: Simplify right side
    39,120.17x = 1,145,319,197.50
  5. Step 5: Solve for x
    x = 1,145,319,197.50/39,120.17
  6. Step 6: Final answer
    x = 29,276.95

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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.