Home / 28,970.47-39,979.82-18,905.35

Finding the Fourth Proportional to 28,970.47, 39,979.82 and 18,905.35

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Solution

The fourth proportional to 28,970.47, 39,979.82 and 18,905.35 is: 26,089.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,970.47 : 39,979.82 = 18,905.35 : x
  2. Step 2: Convert to fraction form
    28,970.47/39,979.82 = 18,905.35/x
  3. Step 3: Cross multiply
    28,970.47x = 39,979.82 × 18,905.35
  4. Step 4: Simplify right side
    28,970.47x = 755,832,395.51
  5. Step 5: Solve for x
    x = 755,832,395.51/28,970.47
  6. Step 6: Final answer
    x = 26,089.75

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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.