Home / 42,729.96-64,071.44-13,139.58

Finding the Fourth Proportional to 42,729.96, 64,071.44 and 13,139.58

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Solution

The fourth proportional to 42,729.96, 64,071.44 and 13,139.58 is: 19,702.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,729.96 : 64,071.44 = 13,139.58 : x
  2. Step 2: Convert to fraction form
    42,729.96/64,071.44 = 13,139.58/x
  3. Step 3: Cross multiply
    42,729.96x = 64,071.44 × 13,139.58
  4. Step 4: Simplify right side
    42,729.96x = 841,871,811.60
  5. Step 5: Solve for x
    x = 841,871,811.60/42,729.96
  6. Step 6: Final answer
    x = 19,702.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.