Home / 28,700.51-39,607.18-15,780.33

Finding the Fourth Proportional to 28,700.51, 39,607.18 and 15,780.33

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Solution

The fourth proportional to 28,700.51, 39,607.18 and 15,780.33 is: 21,777.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,700.51 : 39,607.18 = 15,780.33 : x
  2. Step 2: Convert to fraction form
    28,700.51/39,607.18 = 15,780.33/x
  3. Step 3: Cross multiply
    28,700.51x = 39,607.18 × 15,780.33
  4. Step 4: Simplify right side
    28,700.51x = 625,014,332.62
  5. Step 5: Solve for x
    x = 625,014,332.62/28,700.51
  6. Step 6: Final answer
    x = 21,777.12

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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.