Home / 21,720.69-29,975.40-12,030.39

Finding the Fourth Proportional to 21,720.69, 29,975.40 and 12,030.39

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Solution

The fourth proportional to 21,720.69, 29,975.40 and 12,030.39 is: 16,602.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.69 : 29,975.40 = 12,030.39 : x
  2. Step 2: Convert to fraction form
    21,720.69/29,975.40 = 12,030.39/x
  3. Step 3: Cross multiply
    21,720.69x = 29,975.40 × 12,030.39
  4. Step 4: Simplify right side
    21,720.69x = 360,615,752.41
  5. Step 5: Solve for x
    x = 360,615,752.41/21,720.69
  6. Step 6: Final answer
    x = 16,602.41

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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.