Home / 39,985.60-59,981.64-13,683.28

Finding the Fourth Proportional to 39,985.60, 59,981.64 and 13,683.28

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Solution

The fourth proportional to 39,985.60, 59,981.64 and 13,683.28 is: 20,526.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,985.60 : 59,981.64 = 13,683.28 : x
  2. Step 2: Convert to fraction form
    39,985.60/59,981.64 = 13,683.28/x
  3. Step 3: Cross multiply
    39,985.60x = 59,981.64 × 13,683.28
  4. Step 4: Simplify right side
    39,985.60x = 820,745,574.98
  5. Step 5: Solve for x
    x = 820,745,574.98/39,985.60
  6. Step 6: Final answer
    x = 20,526.03

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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.