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Finding the Fourth Proportional to 34,805.90, 47,995.84 and 20,656.01

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Solution

The fourth proportional to 34,805.90, 47,995.84 and 20,656.01 is: 28,483.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,805.90 : 47,995.84 = 20,656.01 : x
  2. Step 2: Convert to fraction form
    34,805.90/47,995.84 = 20,656.01/x
  3. Step 3: Cross multiply
    34,805.90x = 47,995.84 × 20,656.01
  4. Step 4: Simplify right side
    34,805.90x = 991,402,696.81
  5. Step 5: Solve for x
    x = 991,402,696.81/34,805.90
  6. Step 6: Final answer
    x = 28,483.75

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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.