Home / 28,490.51-39,319.40-18,913.48

Finding the Fourth Proportional to 28,490.51, 39,319.40 and 18,913.48

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Solution

The fourth proportional to 28,490.51, 39,319.40 and 18,913.48 is: 26,102.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.51 : 39,319.40 = 18,913.48 : x
  2. Step 2: Convert to fraction form
    28,490.51/39,319.40 = 18,913.48/x
  3. Step 3: Cross multiply
    28,490.51x = 39,319.40 × 18,913.48
  4. Step 4: Simplify right side
    28,490.51x = 743,666,634.50
  5. Step 5: Solve for x
    x = 743,666,634.50/28,490.51
  6. Step 6: Final answer
    x = 26,102.26

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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.