Home / 43,139.79-64,712.93-13,557.51

Finding the Fourth Proportional to 43,139.79, 64,712.93 and 13,557.51

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Solution

The fourth proportional to 43,139.79, 64,712.93 and 13,557.51 is: 20,337.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,139.79 : 64,712.93 = 13,557.51 : x
  2. Step 2: Convert to fraction form
    43,139.79/64,712.93 = 13,557.51/x
  3. Step 3: Cross multiply
    43,139.79x = 64,712.93 × 13,557.51
  4. Step 4: Simplify right side
    43,139.79x = 877,346,127.82
  5. Step 5: Solve for x
    x = 877,346,127.82/43,139.79
  6. Step 6: Final answer
    x = 20,337.28

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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.