Home / 30,656.32-42,309.64-18,717.10

Finding the Fourth Proportional to 30,656.32, 42,309.64 and 18,717.10

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Solution

The fourth proportional to 30,656.32, 42,309.64 and 18,717.10 is: 25,831.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,656.32 : 42,309.64 = 18,717.10 : x
  2. Step 2: Convert to fraction form
    30,656.32/42,309.64 = 18,717.10/x
  3. Step 3: Cross multiply
    30,656.32x = 42,309.64 × 18,717.10
  4. Step 4: Simplify right side
    30,656.32x = 791,913,762.84
  5. Step 5: Solve for x
    x = 791,913,762.84/30,656.32
  6. Step 6: Final answer
    x = 25,831.99

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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.