Home / 30,985.73-42,736.44-20,898.19

Finding the Fourth Proportional to 30,985.73, 42,736.44 and 20,898.19

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Solution

The fourth proportional to 30,985.73, 42,736.44 and 20,898.19 is: 28,823.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,985.73 : 42,736.44 = 20,898.19 : x
  2. Step 2: Convert to fraction form
    30,985.73/42,736.44 = 20,898.19/x
  3. Step 3: Cross multiply
    30,985.73x = 42,736.44 × 20,898.19
  4. Step 4: Simplify right side
    30,985.73x = 893,114,243.04
  5. Step 5: Solve for x
    x = 893,114,243.04/30,985.73
  6. Step 6: Final answer
    x = 28,823.40

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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.