Home / 21,802.32-30,085.08-12,370.80

Finding the Fourth Proportional to 21,802.32, 30,085.08 and 12,370.80

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Solution

The fourth proportional to 21,802.32, 30,085.08 and 12,370.80 is: 17,070.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,802.32 : 30,085.08 = 12,370.80 : x
  2. Step 2: Convert to fraction form
    21,802.32/30,085.08 = 12,370.80/x
  3. Step 3: Cross multiply
    21,802.32x = 30,085.08 × 12,370.80
  4. Step 4: Simplify right side
    21,802.32x = 372,176,507.66
  5. Step 5: Solve for x
    x = 372,176,507.66/21,802.32
  6. Step 6: Final answer
    x = 17,070.50

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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.