Home / 30,483.04-42,047.76-20,918.56

Finding the Fourth Proportional to 30,483.04, 42,047.76 and 20,918.56

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Solution

The fourth proportional to 30,483.04, 42,047.76 and 20,918.56 is: 28,854.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,483.04 : 42,047.76 = 20,918.56 : x
  2. Step 2: Convert to fraction form
    30,483.04/42,047.76 = 20,918.56/x
  3. Step 3: Cross multiply
    30,483.04x = 42,047.76 × 20,918.56
  4. Step 4: Simplify right side
    30,483.04x = 879,578,590.43
  5. Step 5: Solve for x
    x = 879,578,590.43/30,483.04
  6. Step 6: Final answer
    x = 28,854.69

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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.