Home / 20,477.16-28,259.64-12,518.10

Finding the Fourth Proportional to 20,477.16, 28,259.64 and 12,518.10

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Solution

The fourth proportional to 20,477.16, 28,259.64 and 12,518.10 is: 17,275.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,477.16 : 28,259.64 = 12,518.10 : x
  2. Step 2: Convert to fraction form
    20,477.16/28,259.64 = 12,518.10/x
  3. Step 3: Cross multiply
    20,477.16x = 28,259.64 × 12,518.10
  4. Step 4: Simplify right side
    20,477.16x = 353,756,999.48
  5. Step 5: Solve for x
    x = 353,756,999.48/20,477.16
  6. Step 6: Final answer
    x = 17,275.69

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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.