Home / 31,430.53-43,371.56-18,507.76

Finding the Fourth Proportional to 31,430.53, 43,371.56 and 18,507.76

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Solution

The fourth proportional to 31,430.53, 43,371.56 and 18,507.76 is: 25,539.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,430.53 : 43,371.56 = 18,507.76 : x
  2. Step 2: Convert to fraction form
    31,430.53/43,371.56 = 18,507.76/x
  3. Step 3: Cross multiply
    31,430.53x = 43,371.56 × 18,507.76
  4. Step 4: Simplify right side
    31,430.53x = 802,710,330.77
  5. Step 5: Solve for x
    x = 802,710,330.77/31,430.53
  6. Step 6: Final answer
    x = 25,539.19

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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.