Home / 28,283.02-39,030.64-15,707.78

Finding the Fourth Proportional to 28,283.02, 39,030.64 and 15,707.78

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Solution

The fourth proportional to 28,283.02, 39,030.64 and 15,707.78 is: 21,676.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,283.02 : 39,030.64 = 15,707.78 : x
  2. Step 2: Convert to fraction form
    28,283.02/39,030.64 = 15,707.78/x
  3. Step 3: Cross multiply
    28,283.02x = 39,030.64 × 15,707.78
  4. Step 4: Simplify right side
    28,283.02x = 613,084,706.38
  5. Step 5: Solve for x
    x = 613,084,706.38/28,283.02
  6. Step 6: Final answer
    x = 21,676.78

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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.