Home / 31,077.36-42,887.34-18,509.40

Finding the Fourth Proportional to 31,077.36, 42,887.34 and 18,509.40

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Solution

The fourth proportional to 31,077.36, 42,887.34 and 18,509.40 is: 25,543.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,077.36 : 42,887.34 = 18,509.40 : x
  2. Step 2: Convert to fraction form
    31,077.36/42,887.34 = 18,509.40/x
  3. Step 3: Cross multiply
    31,077.36x = 42,887.34 × 18,509.40
  4. Step 4: Simplify right side
    31,077.36x = 793,818,931.00
  5. Step 5: Solve for x
    x = 793,818,931.00/31,077.36
  6. Step 6: Final answer
    x = 25,543.32

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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.