Home / 21,004.76-28,976.36-13,445.03

Finding the Fourth Proportional to 21,004.76, 28,976.36 and 13,445.03

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Solution

The fourth proportional to 21,004.76, 28,976.36 and 13,445.03 is: 18,547.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.76 : 28,976.36 = 13,445.03 : x
  2. Step 2: Convert to fraction form
    21,004.76/28,976.36 = 13,445.03/x
  3. Step 3: Cross multiply
    21,004.76x = 28,976.36 × 13,445.03
  4. Step 4: Simplify right side
    21,004.76x = 389,588,034.71
  5. Step 5: Solve for x
    x = 389,588,034.71/21,004.76
  6. Step 6: Final answer
    x = 18,547.60

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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.