Home / 21,329.06-29,431.77-15,030.50

Finding the Fourth Proportional to 21,329.06, 29,431.77 and 15,030.50

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Solution

The fourth proportional to 21,329.06, 29,431.77 and 15,030.50 is: 20,740.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.06 : 29,431.77 = 15,030.50 : x
  2. Step 2: Convert to fraction form
    21,329.06/29,431.77 = 15,030.50/x
  3. Step 3: Cross multiply
    21,329.06x = 29,431.77 × 15,030.50
  4. Step 4: Simplify right side
    21,329.06x = 442,374,218.99
  5. Step 5: Solve for x
    x = 442,374,218.99/21,329.06
  6. Step 6: Final answer
    x = 20,740.45

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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.