Home / 30,557.02-42,170.64-17,128.28

Finding the Fourth Proportional to 30,557.02, 42,170.64 and 17,128.28

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Solution

The fourth proportional to 30,557.02, 42,170.64 and 17,128.28 is: 23,638.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,557.02 : 42,170.64 = 17,128.28 : x
  2. Step 2: Convert to fraction form
    30,557.02/42,170.64 = 17,128.28/x
  3. Step 3: Cross multiply
    30,557.02x = 42,170.64 × 17,128.28
  4. Step 4: Simplify right side
    30,557.02x = 722,310,444.06
  5. Step 5: Solve for x
    x = 722,310,444.06/30,557.02
  6. Step 6: Final answer
    x = 23,638.12

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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.