Finding the Fourth Proportional to 28,591,726.20, 39,456,886.86 and 15,538,985.79
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Solution
The fourth proportional to 28,591,726.20, 39,456,886.86 and 15,538,985.79 is: 21,443,965.99
Step by Step Solution
- Step 1: Write the proportion equation
28,591,726.20 : 39,456,886.86 = 15,538,985.79 : x - Step 2: Convert to fraction form
28,591,726.20/39,456,886.86 = 15,538,985.79/x - Step 3: Cross multiply
28,591,726.20x = 39,456,886.86 × 15,538,985.79 - Step 4: Simplify right side
28,591,726.20x = 613,120,004,235,177.62 - Step 5: Solve for x
x = 613,120,004,235,177.62/28,591,726.20 - Step 6: Final answer
x = 21,443,965.99
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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.