Home / 21,931.16-30,263.15-12,977.10

Finding the Fourth Proportional to 21,931.16, 30,263.15 and 12,977.10

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Solution

The fourth proportional to 21,931.16, 30,263.15 and 12,977.10 is: 17,907.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.16 : 30,263.15 = 12,977.10 : x
  2. Step 2: Convert to fraction form
    21,931.16/30,263.15 = 12,977.10/x
  3. Step 3: Cross multiply
    21,931.16x = 30,263.15 × 12,977.10
  4. Step 4: Simplify right side
    21,931.16x = 392,727,923.87
  5. Step 5: Solve for x
    x = 392,727,923.87/21,931.16
  6. Step 6: Final answer
    x = 17,907.31

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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.