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Finding the Fourth Proportional to 53,005.60, 79,478.16 and 21,803.68

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Solution

The fourth proportional to 53,005.60, 79,478.16 and 21,803.68 is: 32,693.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,005.60 : 79,478.16 = 21,803.68 : x
  2. Step 2: Convert to fraction form
    53,005.60/79,478.16 = 21,803.68/x
  3. Step 3: Cross multiply
    53,005.60x = 79,478.16 × 21,803.68
  4. Step 4: Simplify right side
    53,005.60x = 1,732,916,367.63
  5. Step 5: Solve for x
    x = 1,732,916,367.63/53,005.60
  6. Step 6: Final answer
    x = 32,693.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.