Home / 20,870.44-28,802.10-12,485.32

Finding the Fourth Proportional to 20,870.44, 28,802.10 and 12,485.32

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Solution

The fourth proportional to 20,870.44, 28,802.10 and 12,485.32 is: 17,230.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.44 : 28,802.10 = 12,485.32 : x
  2. Step 2: Convert to fraction form
    20,870.44/28,802.10 = 12,485.32/x
  3. Step 3: Cross multiply
    20,870.44x = 28,802.10 × 12,485.32
  4. Step 4: Simplify right side
    20,870.44x = 359,603,435.17
  5. Step 5: Solve for x
    x = 359,603,435.17/20,870.44
  6. Step 6: Final answer
    x = 17,230.28

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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.