Home / 31,581.90-47,389.32-12,875.76

Finding the Fourth Proportional to 31,581.90, 47,389.32 and 12,875.76

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Solution

The fourth proportional to 31,581.90, 47,389.32 and 12,875.76 is: 19,320.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,581.90 : 47,389.32 = 12,875.76 : x
  2. Step 2: Convert to fraction form
    31,581.90/47,389.32 = 12,875.76/x
  3. Step 3: Cross multiply
    31,581.90x = 47,389.32 × 12,875.76
  4. Step 4: Simplify right side
    31,581.90x = 610,173,510.88
  5. Step 5: Solve for x
    x = 610,173,510.88/31,581.90
  6. Step 6: Final answer
    x = 19,320.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.