Home / 30,840.17-42,560.47-18,901.20

Finding the Fourth Proportional to 30,840.17, 42,560.47 and 18,901.20

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Solution

The fourth proportional to 30,840.17, 42,560.47 and 18,901.20 is: 26,084.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,840.17 : 42,560.47 = 18,901.20 : x
  2. Step 2: Convert to fraction form
    30,840.17/42,560.47 = 18,901.20/x
  3. Step 3: Cross multiply
    30,840.17x = 42,560.47 × 18,901.20
  4. Step 4: Simplify right side
    30,840.17x = 804,443,955.56
  5. Step 5: Solve for x
    x = 804,443,955.56/30,840.17
  6. Step 6: Final answer
    x = 26,084.29

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Double scale
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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.