Home / 21,779.07-30,055.08-12,347.63

Finding the Fourth Proportional to 21,779.07, 30,055.08 and 12,347.63

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Solution

The fourth proportional to 21,779.07, 30,055.08 and 12,347.63 is: 17,039.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,779.07 : 30,055.08 = 12,347.63 : x
  2. Step 2: Convert to fraction form
    21,779.07/30,055.08 = 12,347.63/x
  3. Step 3: Cross multiply
    21,779.07x = 30,055.08 × 12,347.63
  4. Step 4: Simplify right side
    21,779.07x = 371,109,007.46
  5. Step 5: Solve for x
    x = 371,109,007.46/21,779.07
  6. Step 6: Final answer
    x = 17,039.71

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Double scale
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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.