Home / 20,370.34-28,109.55-12,411.28

Finding the Fourth Proportional to 20,370.34, 28,109.55 and 12,411.28

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Solution

The fourth proportional to 20,370.34, 28,109.55 and 12,411.28 is: 17,126.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.34 : 28,109.55 = 12,411.28 : x
  2. Step 2: Convert to fraction form
    20,370.34/28,109.55 = 12,411.28/x
  3. Step 3: Cross multiply
    20,370.34x = 28,109.55 × 12,411.28
  4. Step 4: Simplify right side
    20,370.34x = 348,875,495.72
  5. Step 5: Solve for x
    x = 348,875,495.72/20,370.34
  6. Step 6: Final answer
    x = 17,126.64

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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.