Home / 30,487.04-42,048.40-20,412.28

Finding the Fourth Proportional to 30,487.04, 42,048.40 and 20,412.28

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Solution

The fourth proportional to 30,487.04, 42,048.40 and 20,412.28 is: 28,153.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,487.04 : 42,048.40 = 20,412.28 : x
  2. Step 2: Convert to fraction form
    30,487.04/42,048.40 = 20,412.28/x
  3. Step 3: Cross multiply
    30,487.04x = 42,048.40 × 20,412.28
  4. Step 4: Simplify right side
    30,487.04x = 858,303,714.35
  5. Step 5: Solve for x
    x = 858,303,714.35/30,487.04
  6. Step 6: Final answer
    x = 28,153.07

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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.