Home / 20,477.85-28,248.36-13,683.57

Finding the Fourth Proportional to 20,477.85, 28,248.36 and 13,683.57

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Solution

The fourth proportional to 20,477.85, 28,248.36 and 13,683.57 is: 18,875.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,477.85 : 28,248.36 = 13,683.57 : x
  2. Step 2: Convert to fraction form
    20,477.85/28,248.36 = 13,683.57/x
  3. Step 3: Cross multiply
    20,477.85x = 28,248.36 × 13,683.57
  4. Step 4: Simplify right side
    20,477.85x = 386,538,411.45
  5. Step 5: Solve for x
    x = 386,538,411.45/20,477.85
  6. Step 6: Final answer
    x = 18,875.93

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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.