Home / 30,738.86-42,409.10-18,643.04

Finding the Fourth Proportional to 30,738.86, 42,409.10 and 18,643.04

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Solution

The fourth proportional to 30,738.86, 42,409.10 and 18,643.04 is: 25,721.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,738.86 : 42,409.10 = 18,643.04 : x
  2. Step 2: Convert to fraction form
    30,738.86/42,409.10 = 18,643.04/x
  3. Step 3: Cross multiply
    30,738.86x = 42,409.10 × 18,643.04
  4. Step 4: Simplify right side
    30,738.86x = 790,634,547.66
  5. Step 5: Solve for x
    x = 790,634,547.66/30,738.86
  6. Step 6: Final answer
    x = 25,721.01

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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.