Home / 39,985.04-59,979.60-10,402.72

Finding the Fourth Proportional to 39,985.04, 59,979.60 and 10,402.72

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Solution

The fourth proportional to 39,985.04, 59,979.60 and 10,402.72 is: 15,604.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,985.04 : 59,979.60 = 10,402.72 : x
  2. Step 2: Convert to fraction form
    39,985.04/59,979.60 = 10,402.72/x
  3. Step 3: Cross multiply
    39,985.04x = 59,979.60 × 10,402.72
  4. Step 4: Simplify right side
    39,985.04x = 623,950,984.51
  5. Step 5: Solve for x
    x = 623,950,984.51/39,985.04
  6. Step 6: Final answer
    x = 15,604.61

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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.