Home / 28,929.69-39,940.40-18,875.57

Finding the Fourth Proportional to 28,929.69, 39,940.40 and 18,875.57

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Solution

The fourth proportional to 28,929.69, 39,940.40 and 18,875.57 is: 26,059.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,929.69 : 39,940.40 = 18,875.57 : x
  2. Step 2: Convert to fraction form
    28,929.69/39,940.40 = 18,875.57/x
  3. Step 3: Cross multiply
    28,929.69x = 39,940.40 × 18,875.57
  4. Step 4: Simplify right side
    28,929.69x = 753,897,663.51
  5. Step 5: Solve for x
    x = 753,897,663.51/28,929.69
  6. Step 6: Final answer
    x = 26,059.65

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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.